402252656 has 40 divisors (see below), whose sum is σ = 845414640. Its totient is φ = 184306176.

The previous prime is 402252637. The next prime is 402252671. The reversal of 402252656 is 656252204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21956 + ... + 35868.

It is an arithmetic number, because the mean of its divisors is an integer number (21135366).

Almost surely, 2^402252656 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 402252656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422707320).

402252656 is an abundant number, since it is smaller than the sum of its proper divisors (443161984).

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

402252656 is a wasteful number, since it uses less digits than its factorization.

402252656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14073 (or 14067 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 402252656 is about 20056.2373340565. The cubic root of 402252656 is about 738.1868539774.

The spelling of 402252656 in words is "four hundred two million, two hundred fifty-two thousand, six hundred fifty-six".