399901932 has 18 divisors (see below), whose sum is σ = 1010863308. Its totient is φ = 133300632.

The previous prime is 399901921. The next prime is 399901939. The reversal of 399901932 is 239109993.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (399901939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5554158 + ... + 5554229.

Almost surely, 2^399901932 is an apocalyptic number.

It is an amenable number.

399901932 is an abundant number, since it is smaller than the sum of its proper divisors (610961376).

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

399901932 is a wasteful number, since it uses less digits than its factorization.

399901932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11108397 (or 11108392 counting only the distinct ones).

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

The square root of 399901932 is about 19997.5481497108. The cubic root of 399901932 is about 736.7460805397.

The spelling of 399901932 in words is "three hundred ninety-nine million, nine hundred one thousand, nine hundred thirty-two".