390657025 has 24 divisors (see below), whose sum is σ = 559544544. Its totient is φ = 267398400.

The previous prime is 390656971. The next prime is 390657037. The reversal of 390657025 is 520756093.

It is not a de Polignac number, because 390657025 - 2¹⁷ = 390525953 is a prime.

It is a super-2 number, since 2×390657025² = 305225822363701250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37107 + ... + 46456.

It is an arithmetic number, because the mean of its divisors is an integer number (23314356).

Almost surely, 2^390657025 is an apocalyptic number.

It is an amenable number.

390657025 is a deficient number, since it is larger than the sum of its proper divisors (168887519).

390657025 is a wasteful number, since it uses less digits than its factorization.

390657025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83601 (or 83596 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 390657025 is about 19765.0455349842. The cubic root of 390657025 is about 731.0244108965.

The spelling of 390657025 in words is "three hundred ninety million, six hundred fifty-seven thousand, twenty-five".