Properties of the Number -28245

Twenty-Eight Thousand Two Hundred Forty-Five

Basics

Value: -28246 → -28245 → -28244

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 269

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 269, 807

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111001010101

Octal: -67125

Duodecimal: -14419

Hexadecimal: -6e55

Square: 797780025

Square Root: 168.062488378579

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 partitions of n such that the largest part is a multiple of the smallest part. A117086

Smaller of a pair of consecutive lucky numbers with a gap of 2n. A31884

Reversion of y - y² + y⁴ - y⁵. A63026

Expansion of ∏_{i>=1, j>=1} 1 / (1 - x^{i·j*(j + 1}/2)). A327744

a(n) = 441·n² + 21. A158603

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 16. A31694

Number of arrangements of 4 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero. A188359

Triangle read by rows giving coefficients of Genocchi q-numbers B_n(1,q) (n >= 1) expanded in powers of q. A193762

Numbers whose base-5 representation contains exactly three 0's and three 4's. A45217

Number of permutations f of {1,...,n} such that 3^k + 3^f(k) - 1 is prime for every k = 1,...,n. A321766