390812990 has 64 divisors (see below), whose sum is σ = 758626560. Its totient is φ = 144668160.

The previous prime is 390812971. The next prime is 390812993. The reversal of 390812990 is 99218093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390812993) 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 31 ways as a sum of consecutive naturals, for example, 722120 + ... + 722660.

It is an arithmetic number, because the mean of its divisors is an integer number (11853540).

Almost surely, 2^390812990 is an apocalyptic number.

390812990 is a deficient number, since it is larger than the sum of its proper divisors (367813570).

390812990 is a wasteful number, since it uses less digits than its factorization.

390812990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 390812990 is about 19768.9906166198. The cubic root of 390812990 is about 731.1216821134.

The spelling of 390812990 in words is "three hundred ninety million, eight hundred twelve thousand, nine hundred ninety".