402991596 has 144 divisors (see below), whose sum is σ = 1297820160. Its totient is φ = 102643200.

The previous prime is 402991553. The next prime is 402991601. The reversal of 402991596 is 695199204.

402991596 is a `hidden beast` number, since 402 + 99 + 159 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78921 + ... + 83871.

It is an arithmetic number, because the mean of its divisors is an integer number (9012640).

Almost surely, 2^402991596 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 402991596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648910080).

402991596 is an abundant number, since it is smaller than the sum of its proper divisors (894828564).

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

402991596 is a wasteful number, since it uses less digits than its factorization.

402991596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004 (or 4999 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 402991596 is about 20074.6505822642. The cubic root of 402991596 is about 738.6385950348.

The spelling of 402991596 in words is "four hundred two million, nine hundred ninety-one thousand, five hundred ninety-six".