402534656 has 18 divisors (see below), whose sum is σ = 803497422. Its totient is φ = 201267200.

The previous prime is 402534647. The next prime is 402534673. The reversal of 402534656 is 656435204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 248377600 + 154157056 = 15760^2 + 12416^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785945 + ... + 786456.

Almost surely, 2^402534656 is an apocalyptic number.

It is an amenable number.

402534656 is a deficient number, since it is larger than the sum of its proper divisors (400962766).

402534656 is an equidigital number, since it uses as much as digits as its factorization.

402534656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572417 (or 1572403 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 402534656 is about 20063.2663342737. The cubic root of 402534656 is about 738.3593161211.

The spelling of 402534656 in words is "four hundred two million, five hundred thirty-four thousand, six hundred fifty-six".