390904613 has 32 divisors (see below), whose sum is σ = 478224000. Its totient is φ = 314910720.

The previous prime is 390904609. The next prime is 390904649. The reversal of 390904613 is 316409093.

It is not a de Polignac number, because 390904613 - 2² = 390904609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390904663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 955553 + ... + 955961.

It is an arithmetic number, because the mean of its divisors is an integer number (14944500).

Almost surely, 2^390904613 is an apocalyptic number.

It is an amenable number.

390904613 is a deficient number, since it is larger than the sum of its proper divisors (87319387).

390904613 is a wasteful number, since it uses less digits than its factorization.

390904613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 390904613 is about 19771.3078221953. The cubic root of 390904613 is about 731.1788128720.

The spelling of 390904613 in words is "three hundred ninety million, nine hundred four thousand, six hundred thirteen".