Properties of the Number 1628

One Thousand Six Hundred Twenty-Eight

Basics

Value: 1627 → 1628 → 1629

Parity: even

Prime: No

Previous Prime: 1627

Next Prime: 1637

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 11 × 37

Divisors: 1, 2, 4, 11, 22, 37, 44, 74, 148, 407

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11001011100

Octal: 3134

Duodecimal: B38

Hexadecimal: 65c

Square: 2650384

Square Root: 40.34848200366403

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

Sequence and first differences (A030124) together list all positive numbers exactly once. A5228

Number of compositions of the integer n in which the first part is >= the other parts. A79500

Array read by antidiagonals, where each row is the counting sequence of a certain type of fixed polyominoids. A366767

Number of balanced ordered trees with n nodes. A7059

Number of compositions of n into divisors of n. A100346

Eight bishops and one elephant on a 3 X 3 chessboard. G.f.: (1+x-5·x²)/(1-3·x-x²+6·x³). A175655

a(n) = n*(n+7). A28563

Numbers m such that there are precisely 11 groups of order m. A249554

Numbers k whose deficiency is 64: 2k - σ(k) = 64. A275997

Number of partitions of n into parts >= 7. A185327