399208368 has 40 divisors (see below), whose sum is σ = 1110619888. Its totient is φ = 122833152.

The previous prime is 399208367. The next prime is 399208379. The reversal of 399208368 is 863802993.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (399208367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319255 + ... + 320502.

Almost surely, 2^399208368 is an apocalyptic number.

It is an amenable number.

399208368 is an abundant number, since it is smaller than the sum of its proper divisors (711411520).

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

399208368 is a wasteful number, since it uses less digits than its factorization.

399208368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639781 (or 639775 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 399208368 is about 19980.1993984044. The cubic root of 399208368 is about 736.3199125165.

The spelling of 399208368 in words is "three hundred ninety-nine million, two hundred eight thousand, three hundred sixty-eight".