399055012 has 12 divisors (see below), whose sum is σ = 698824476. Its totient is φ = 199390880.

The previous prime is 399054973. The next prime is 399055021. The reversal of 399055012 is 210550993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 202606756 + 196448256 = 14234^2 + 14016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27439 + ... + 39382.

It is an arithmetic number, because the mean of its divisors is an integer number (58235373).

Almost surely, 2^399055012 is an apocalyptic number.

It is an amenable number.

399055012 is a deficient number, since it is larger than the sum of its proper divisors (299769464).

399055012 is a wasteful number, since it uses less digits than its factorization.

399055012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68318 (or 68316 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 399055012 is about 19976.3613303324. The cubic root of 399055012 is about 736.2256146110.

The spelling of 399055012 in words is "three hundred ninety-nine million, fifty-five thousand, twelve".