390964427 has 16 divisors (see below), whose sum is σ = 450774720. Its totient is φ = 332158848.

The previous prime is 390964403. The next prime is 390964429. The reversal of 390964427 is 724469093.

It is not a de Polignac number, because 390964427 - 2¹⁰ = 390963403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390964429) 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, 701633 + ... + 702189.

It is an arithmetic number, because the mean of its divisors is an integer number (28173420).

Almost surely, 2^390964427 is an apocalyptic number.

390964427 is a deficient number, since it is larger than the sum of its proper divisors (59810293).

390964427 is a wasteful number, since it uses less digits than its factorization.

390964427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 390964427 is about 19772.8204108569. The cubic root of 390964427 is about 731.2161045774.

The spelling of 390964427 in words is "three hundred ninety million, nine hundred sixty-four thousand, four hundred twenty-seven".