Properties of the Number 1988

One Thousand Nine Hundred Eighty-Eight

Basics

Value: 1987 → 1988 → 1989

Parity: even

Prime: No

Previous Prime: 1987

Next Prime: 1993

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 7 × 71

Divisors: 1, 2, 4, 7, 14, 28, 71, 142, 284, 497

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 11111000100

Octal: 3704

Duodecimal: 1198

Hexadecimal: 7c4

Square: 3952144

Square Root: 44.58699361921591

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Sum of the first n primes. A7504

The "comma sequence": the lexicographically earliest sequence of positive numbers with the property that the sequence formed by the pairs of digits adjacent to the commas between the terms is the same as the sequence of successive differences between the terms. A121805

Number of partitions of n into nonprime parts. A2095

Numbers n such that Bernoulli number B_n has denominator 870. A272185

Triangle read by rows giving T(n,k) = number of inequivalent linear [n,k] binary codes (n >= 1, 1 <= k <= n). A34356

Sum of first n composite numbers. A53767

Numbers m such that there are precisely 13 groups of order m. A292896

Consider the Diophantine equation x³ + y³ = z³ + 1 (1 < x < y < z) or 'Fermat near misses'. Sequence gives values of z in monotonic increasing order. A50791

Number of partitions of n in which the sequence of the sum of the same summands is increasing. A304428

Larger member of friendly pairs ordered by smallest maximal element. A50973