399880868 has 12 divisors (see below), whose sum is σ = 740955852. Its totient is φ = 188179200.

The previous prime is 399880849. The next prime is 399880879. The reversal of 399880868 is 868088993.

It can be written as a sum of positive squares in 2 ways, for example, as 325369444 + 74511424 = 18038^2 + 8632^2 .

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, 2940233 + ... + 2940368.

It is an arithmetic number, because the mean of its divisors is an integer number (61746321).

Almost surely, 2^399880868 is an apocalyptic number.

It is an amenable number.

399880868 is a deficient number, since it is larger than the sum of its proper divisors (341074984).

399880868 is a wasteful number, since it uses less digits than its factorization.

399880868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880622 (or 5880620 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 399880868 is about 19997.0214782102. The cubic root of 399880868 is about 736.7331447916.

The spelling of 399880868 in words is "three hundred ninety-nine million, eight hundred eighty thousand, eight hundred sixty-eight".