399055564 has 12 divisors (see below), whose sum is σ = 698496624. Its totient is φ = 199485104.

The previous prime is 399055549. The next prime is 399055577. The reversal of 399055564 is 465550993.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20457 + ... + 34879.

It is an arithmetic number, because the mean of its divisors is an integer number (58208052).

Almost surely, 2^399055564 is an apocalyptic number.

It is an amenable number.

399055564 is a deficient number, since it is larger than the sum of its proper divisors (299441060).

399055564 is a wasteful number, since it uses less digits than its factorization.

399055564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21344 (or 21342 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 399055564 is about 19976.3751466576. The cubic root of 399055564 is about 736.2259540766.

The spelling of 399055564 in words is "three hundred ninety-nine million, fifty-five thousand, five hundred sixty-four".