2805256 has 8 divisors (see below), whose sum is σ = 5259870. Its totient is φ = 1402624.

The previous prime is 2805251. The next prime is 2805259. The reversal of 2805256 is 6525082.

It can be written as a sum of positive squares in only one way, i.e., 2149156 + 656100 = 1466^2 + 810^2 .

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

It is a super-2 number, since 2×2805256² = 15738922451072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2805251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175321 + ... + 175336.

2^2805256 is an apocalyptic number.

It is an amenable number.

2805256 is a deficient number, since it is larger than the sum of its proper divisors (2454614).

2805256 is a wasteful number, since it uses less digits than its factorization.

2805256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350663 (or 350659 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2805256 is about 1674.8898471243. The cubic root of 2805256 is about 141.0341114257.

The spelling of 2805256 in words is "two million, eight hundred five thousand, two hundred fifty-six".