28080256 has 16 divisors (see below), whose sum is σ = 55941390. Its totient is φ = 14040064.

The previous prime is 28080229. The next prime is 28080257. The reversal of 28080256 is 65208082.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 3240000 = 4984^2 + 1800^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109561 + ... + 109816.

Almost surely, 2^28080256 is an apocalyptic number.

It is an amenable number.

28080256 is a deficient number, since it is larger than the sum of its proper divisors (27861134).

28080256 is an equidigital number, since it uses as much as digits as its factorization.

28080256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219391 (or 219379 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28080256 is about 5299.0806749850. The cubic root of 28080256 is about 303.9487448213.

The spelling of 28080256 in words is "twenty-eight million, eighty thousand, two hundred fifty-six".