7856256 has 64 divisors (see below), whose sum is σ = 21420000. Its totient is φ = 2549760.

The previous prime is 7856249. The next prime is 7856257. The reversal of 7856256 is 6526587.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (7856257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15495 + ... + 15993.

Almost surely, 2^7856256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7856256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10710000).

7856256 is an abundant number, since it is smaller than the sum of its proper divisors (13563744).

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

7856256 is a wasteful number, since it uses less digits than its factorization.

7856256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 545 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 7856256 is about 2802.9013539545. The cubic root of 7856256 is about 198.7948864246.

It can be divided in two parts, 785625 and 6, that added together give a triangular number (785631 = T₁₂₅₃).

The spelling of 7856256 in words is "seven million, eight hundred fifty-six thousand, two hundred fifty-six".