399622368 has 24 divisors (see below), whose sum is σ = 1049008968. Its totient is φ = 133207424.

The previous prime is 399622343. The next prime is 399622397. The reversal of 399622368 is 863226993.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

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, 2081271 + ... + 2081462.

It is an arithmetic number, because the mean of its divisors is an integer number (43708707).

Almost surely, 2^399622368 is an apocalyptic number.

It is an amenable number.

399622368 is an abundant number, since it is smaller than the sum of its proper divisors (649386600).

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

399622368 is a wasteful number, since it uses less digits than its factorization.

399622368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162746 (or 4162738 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 399622368 is about 19990.5569707300. The cubic root of 399622368 is about 736.5743586920.

The spelling of 399622368 in words is "three hundred ninety-nine million, six hundred twenty-two thousand, three hundred sixty-eight".