399019932 has 60 divisors (see below), whose sum is σ = 1079111880. Its totient is φ = 128417184.

The previous prime is 399019889. The next prime is 399019967. The reversal of 399019932 is 239910993.

It is a super-2 number, since 2×399019932² = 318433812266569248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11838 + ... + 30629.

It is an arithmetic number, because the mean of its divisors is an integer number (17985198).

Almost surely, 2^399019932 is an apocalyptic number.

It is an amenable number.

399019932 is an abundant number, since it is smaller than the sum of its proper divisors (680091948).

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

399019932 is a wasteful number, since it uses less digits than its factorization.

399019932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42512 (or 42501 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The square root of 399019932 is about 19975.4832732527. The cubic root of 399019932 is about 736.2040406838.

The spelling of 399019932 in words is "three hundred ninety-nine million, nineteen thousand, nine hundred thirty-two".