399388369000 has 64 divisors (see below), whose sum is σ = 934916158800. Its totient is φ = 159695968000.

The previous prime is 399388368983. The next prime is 399388369067. The reversal of 399388369000 is 963883993.

It can be written as a sum of positive squares in 8 ways, for example, as 3941077284 + 395447291716 = 62778^2 + 628846^2 .

It is a super-2 number, since 2×399388369000² (a number of 24 digits) contains 22 as substring.

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, 2668146 + ... + 2813854.

Almost surely, 2^399388369000 is an apocalyptic number.

It is an amenable number.

399388369000 is an abundant number, since it is smaller than the sum of its proper divisors (535527789800).

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

399388369000 is a wasteful number, since it uses less digits than its factorization.

399388369000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148471 (or 148457 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 58.

The spelling of 399388369000 in words is "three hundred ninety-nine billion, three hundred eighty-eight million, three hundred sixty-nine thousand".