390917793 has 8 divisors (see below), whose sum is σ = 595684288. Its totient is φ = 223381584.

The previous prime is 390917717. The next prime is 390917881. The reversal of 390917793 is 397719093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390917793 - 2⁸ = 390917537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390917393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9307546 + ... + 9307587.

It is an arithmetic number, because the mean of its divisors is an integer number (74460536).

Almost surely, 2^390917793 is an apocalyptic number.

It is an amenable number.

390917793 is a deficient number, since it is larger than the sum of its proper divisors (204766495).

390917793 is a wasteful number, since it uses less digits than its factorization.

390917793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18615143.

The product of its (nonzero) digits is 321489, while the sum is 48.

The square root of 390917793 is about 19771.6411306700. The cubic root of 390917793 is about 731.1870304167.

The spelling of 390917793 in words is "three hundred ninety million, nine hundred seventeen thousand, seven hundred ninety-three".