390779868 has 24 divisors (see below), whose sum is σ = 914060560. Its totient is φ = 129939840.

The previous prime is 390779861. The next prime is 390779887. The reversal of 390779868 is 868977093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390779861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34903 + ... + 44718.

Almost surely, 2^390779868 is an apocalyptic number.

It is an amenable number.

390779868 is an abundant number, since it is smaller than the sum of its proper divisors (523280692).

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

390779868 is a wasteful number, since it uses less digits than its factorization.

390779868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80037 (or 80035 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 390779868 is about 19768.1528727395. The cubic root of 390779868 is about 731.1010269688.

The spelling of 390779868 in words is "three hundred ninety million, seven hundred seventy-nine thousand, eight hundred sixty-eight".