28105256 has 16 divisors (see below), whose sum is σ = 55471200. Its totient is φ = 13312944.

The previous prime is 28105243. The next prime is 28105283. The reversal of 28105256 is 65250182.

28105256 = 674² + 675² + ... + 730².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92300 + ... + 92603.

It is an arithmetic number, because the mean of its divisors is an integer number (3466950).

Almost surely, 2^28105256 is an apocalyptic number.

It is an amenable number.

28105256 is a deficient number, since it is larger than the sum of its proper divisors (27365944).

28105256 is a wasteful number, since it uses less digits than its factorization.

28105256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184928 (or 184924 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28105256 is about 5301.4390499184. The cubic root of 28105256 is about 304.0389204555.

The spelling of 28105256 in words is "twenty-eight million, one hundred five thousand, two hundred fifty-six".