28645256 has 8 divisors (see below), whose sum is σ = 53709870. Its totient is φ = 14322624.

The previous prime is 28645237. The next prime is 28645283. The reversal of 28645256 is 65254682.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 872356 = 5270^2 + 934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790321 + ... + 1790336.

Almost surely, 2^28645256 is an apocalyptic number.

It is an amenable number.

28645256 is a deficient number, since it is larger than the sum of its proper divisors (25064614).

28645256 is a wasteful number, since it uses less digits than its factorization.

28645256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580663 (or 3580659 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 28645256 is about 5352.1263064319. The cubic root of 28645256 is about 305.9737970073.

The spelling of 28645256 in words is "twenty-eight million, six hundred forty-five thousand, two hundred fifty-six".