390992426 has 16 divisors (see below), whose sum is σ = 641750688. Its totient is φ = 177183600.

The previous prime is 390992419. The next prime is 390992447. The reversal of 390992426 is 624299093.

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 7 ways as a sum of consecutive naturals, for example, 19565 + ... + 34128.

It is an arithmetic number, because the mean of its divisors is an integer number (40109418).

Almost surely, 2^390992426 is an apocalyptic number.

390992426 is a deficient number, since it is larger than the sum of its proper divisors (250758262).

390992426 is a wasteful number, since it uses less digits than its factorization.

390992426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54037.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 390992426 is about 19773.5284155358. The cubic root of 390992426 is about 731.2335595593.

The spelling of 390992426 in words is "three hundred ninety million, nine hundred ninety-two thousand, four hundred twenty-six".