390975957 has 8 divisors (see below), whose sum is σ = 579223680. Its totient is φ = 260650620.

The previous prime is 390975953. The next prime is 390975971. The reversal of 390975957 is 759579093.

It is not a de Polignac number, because 390975957 - 2² = 390975953 is a prime.

It is a super-3 number, since 3×390975957³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390975953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7240269 + ... + 7240322.

It is an arithmetic number, because the mean of its divisors is an integer number (72402960).

Almost surely, 2^390975957 is an apocalyptic number.

It is an amenable number.

390975957 is a deficient number, since it is larger than the sum of its proper divisors (188247723).

390975957 is a wasteful number, since it uses less digits than its factorization.

390975957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480600 (or 14480594 counting only the distinct ones).

The product of its (nonzero) digits is 2679075, while the sum is 54.

The square root of 390975957 is about 19773.1119705523. Note that the first 3 decimals coincide. The cubic root of 390975957 is about 731.2232926472.

It can be divided in two parts, 39097 and 5957, that added together give a palindrome (45054).

The spelling of 390975957 in words is "three hundred ninety million, nine hundred seventy-five thousand, nine hundred fifty-seven".