28920256 has 14 divisors (see below), whose sum is σ = 57388760. Its totient is φ = 14460096.

The previous prime is 28920251. The next prime is 28920257. The reversal of 28920256 is 65202982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28920251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225876 + ... + 226003.

Almost surely, 2^28920256 is an apocalyptic number.

It is an amenable number.

28920256 is a deficient number, since it is larger than the sum of its proper divisors (28468504).

28920256 is an equidigital number, since it uses as much as digits as its factorization.

28920256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451891 (or 451881 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28920256 is about 5377.7556657029. The cubic root of 28920256 is about 306.9498161985.

The spelling of 28920256 in words is "twenty-eight million, nine hundred twenty thousand, two hundred fifty-six".