390979388 has 12 divisors (see below), whose sum is σ = 684375720. Its totient is φ = 195443472.

The previous prime is 390979387. The next prime is 390979423. The reversal of 390979388 is 883979093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390979387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13523 + ... + 31061.

It is an arithmetic number, because the mean of its divisors is an integer number (57031310).

Almost surely, 2^390979388 is an apocalyptic number.

It is an amenable number.

390979388 is a deficient number, since it is larger than the sum of its proper divisors (293396332).

390979388 is a wasteful number, since it uses less digits than its factorization.

390979388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23116 (or 23114 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 390979388 is about 19773.1987295936. The cubic root of 390979388 is about 731.2254315850.

The spelling of 390979388 in words is "three hundred ninety million, nine hundred seventy-nine thousand, three hundred eighty-eight".