390647957 has 8 divisors (see below), whose sum is σ = 460856832. Its totient is φ = 324039600.

The previous prime is 390647953. The next prime is 390647993. The reversal of 390647957 is 759746093.

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

It is a cyclic number.

It is not a de Polignac number, because 390647957 - 2² = 390647953 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 (390647953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899894 + ... + 900327.

It is an arithmetic number, because the mean of its divisors is an integer number (57607104).

Almost surely, 2^390647957 is an apocalyptic number.

It is an amenable number.

390647957 is a deficient number, since it is larger than the sum of its proper divisors (70208875).

390647957 is a wasteful number, since it uses less digits than its factorization.

390647957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800259.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 390647957 is about 19764.8161387856. The cubic root of 390647957 is about 731.0187546301.

The spelling of 390647957 in words is "three hundred ninety million, six hundred forty-seven thousand, nine hundred fifty-seven".