390290331 has 4 divisors (see below), whose sum is σ = 520387112. Its totient is φ = 260193552.

The previous prime is 390290291. The next prime is 390290333. The reversal of 390290331 is 133092093.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 390290331 - 2⁷ = 390290203 is a prime.

It is a super-2 number, since 2×390290331² = 304653084944179122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390290333) 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 3 ways as a sum of consecutive naturals, for example, 65048386 + ... + 65048391.

It is an arithmetic number, because the mean of its divisors is an integer number (130096778).

Almost surely, 2^390290331 is an apocalyptic number.

390290331 is a deficient number, since it is larger than the sum of its proper divisors (130096781).

390290331 is a wasteful number, since it uses less digits than its factorization.

390290331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130096780.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 390290331 is about 19755.7670314265. The cubic root of 390290331 is about 730.7956115789.

The spelling of 390290331 in words is "three hundred ninety million, two hundred ninety thousand, three hundred thirty-one".