Properties of the Number 1900

One Thousand Nine Hundred

Basics

Value: 1899 → 1900 → 1901

Parity: even

Prime: No

Previous Prime: 1889

Next Prime: 1901

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 ² × 19

Divisors: 1, 2, 4, 5, 10, 19, 20, 25, 38, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 11101101100

Octal: 3554

Duodecimal: 1124

Hexadecimal: 76c

Square: 3610000

Square Root: 43.58898943540674

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

Number of primes <= 2ⁿ. A7053

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

Number of compositions of n that are neither weakly increasing nor weakly decreasing. A332834

Triangular numbers plus quarter squares: n*(n+1)/2 + floor(n²/4) (i.e., A000217(n) + A002620(n)). A6578

13-gonal (or tridecagonal) numbers: a(n) = n*(11·n - 9)/2. A51865

Multiples of 19 containing a 19 in their decimal representation. A121039

Number of partitions of n into composite parts. A23895

Twice second pentagonal numbers. A49451

Numbers k such that there is exactly one prime-power between prime(k)+1 and prime(k+1)-1. A377287

Expansion of x/(1 - 4·x - 3·x²). A15530