390304717 has 16 divisors (see below), whose sum is σ = 451645632. Its totient is φ = 333349120.

The previous prime is 390304697. The next prime is 390304721. The reversal of 390304717 is 717403093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390304717 is a prime.

It is a super-2 number, since 2×390304717² = 304675544224900178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390304727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125058 + ... + 128140.

It is an arithmetic number, because the mean of its divisors is an integer number (28227852).

Almost surely, 2^390304717 is an apocalyptic number.

It is an amenable number.

390304717 is a deficient number, since it is larger than the sum of its proper divisors (61340915).

390304717 is a wasteful number, since it uses less digits than its factorization.

390304717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 390304717 is about 19756.1311242865. The cubic root of 390304717 is about 730.8045904473.

The spelling of 390304717 in words is "three hundred ninety million, three hundred four thousand, seven hundred seventeen".