399180402 has 24 divisors (see below), whose sum is σ = 865262736. Its totient is φ = 133002936.

The previous prime is 399180377. The next prime is 399180409. The reversal of 399180402 is 204081993.

It is not an unprimeable number, because it can be changed into a prime (399180409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69733 + ... + 75239.

It is an arithmetic number, because the mean of its divisors is an integer number (36052614).

Almost surely, 2^399180402 is an apocalyptic number.

399180402 is an abundant number, since it is smaller than the sum of its proper divisors (466082334).

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

399180402 is a wasteful number, since it uses less digits than its factorization.

399180402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542 (or 9539 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 399180402 is about 19979.4995432819. The cubic root of 399180402 is about 736.3027181512.

The spelling of 399180402 in words is "three hundred ninety-nine million, one hundred eighty thousand, four hundred two".