402809964 has 48 divisors (see below), whose sum is σ = 965357568. Its totient is φ = 130673088.

The previous prime is 402809959. The next prime is 402809977. The reversal of 402809964 is 469908204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78279 + ... + 83265.

It is an arithmetic number, because the mean of its divisors is an integer number (20111616).

Almost surely, 2^402809964 is an apocalyptic number.

It is an amenable number.

402809964 is an abundant number, since it is smaller than the sum of its proper divisors (562547604).

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

402809964 is a wasteful number, since it uses less digits than its factorization.

402809964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 402809964 is about 20070.1261580489. The cubic root of 402809964 is about 738.5276079675.

The spelling of 402809964 in words is "four hundred two million, eight hundred nine thousand, nine hundred sixty-four".