390209025 has 12 divisors (see below), whose sum is σ = 645145712. Its totient is φ = 208111440.

The previous prime is 390209021. The next prime is 390209033. The reversal of 390209025 is 520902093.

It is not a de Polignac number, because 390209025 - 2² = 390209021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390208983 and 390209001.

It is not an unprimeable number, because it can be changed into a prime (390209021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2601319 + ... + 2601468.

Almost surely, 2^390209025 is an apocalyptic number.

It is an amenable number.

390209025 is a deficient number, since it is larger than the sum of its proper divisors (254936687).

390209025 is a wasteful number, since it uses less digits than its factorization.

390209025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202800 (or 5202795 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 390209025 is about 19753.7091453732. The cubic root of 390209025 is about 730.7448611591.

The spelling of 390209025 in words is "three hundred ninety million, two hundred nine thousand, twenty-five".