28256960 has 56 divisors (see below), whose sum is σ = 67757040. Its totient is φ = 11224064.

The previous prime is 28256951. The next prime is 28256981. The reversal of 28256960 is 6965282.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72446 + ... + 72834.

Almost surely, 2^28256960 is an apocalyptic number.

28256960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28256960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33878520).

28256960 is an abundant number, since it is smaller than the sum of its proper divisors (39500080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28256960 is a wasteful number, since it uses less digits than its factorization.

28256960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 28256960 is about 5315.7276077692. The cubic root of 28256960 is about 304.5849770426.

The spelling of 28256960 in words is "twenty-eight million, two hundred fifty-six thousand, nine hundred sixty".