2856256 has 28 divisors (see below), whose sum is σ = 6105652. Its totient is φ = 1317888.

The previous prime is 2856253. The next prime is 2856283. The reversal of 2856256 is 6526582.

2856256 = T₁₄₄ + T₁₄₅ + ... + T₂₇₁.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 2190400 = 816^2 + 1480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885 + ... + 2548.

It is an arithmetic number, because the mean of its divisors is an integer number (218059).

2^2856256 is an apocalyptic number.

2856256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2856256 is an abundant number, since it is smaller than the sum of its proper divisors (3249396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2856256 is a wasteful number, since it uses less digits than its factorization.

2856256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458 (or 3448 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 2856256 is about 1690.0461532159. The cubic root of 2856256 is about 141.8836579293.

The spelling of 2856256 in words is "two million, eight hundred fifty-six thousand, two hundred fifty-six".