4256656 has 40 divisors (see below), whose sum is σ = 8838720. Its totient is φ = 1981056.

The previous prime is 4256653. The next prime is 4256669. The reversal of 4256656 is 6566524.

It is a d-powerful number, because it can be written as 4 + 2²² + 5² + 6 + 6² + 5⁶ + 6⁶ .

It is not an unprimeable number, because it can be changed into a prime (4256653) 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, 15690 + ... + 15958.

It is an arithmetic number, because the mean of its divisors is an integer number (220968).

Almost surely, 2^4256656 is an apocalyptic number.

4256656 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4256656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4419360).

4256656 is an abundant number, since it is smaller than the sum of its proper divisors (4582064).

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

4256656 is a wasteful number, since it uses less digits than its factorization.

4256656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 4256656 is about 2063.1664983709. The cubic root of 4256656 is about 162.0651061787.

The spelling of 4256656 in words is "four million, two hundred fifty-six thousand, six hundred fifty-six".