390043925 has 6 divisors (see below), whose sum is σ = 483654498. Its totient is φ = 312035120.

The previous prime is 390043909. The next prime is 390043949. The reversal of 390043925 is 529340093.

It can be written as a sum of positive squares in 3 ways, for example, as 105042001 + 285001924 = 10249^2 + 16882^2 .

It is not a de Polignac number, because 390043925 - 2⁴ = 390043909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7800854 + ... + 7800903.

It is an arithmetic number, because the mean of its divisors is an integer number (80609083).

Almost surely, 2^390043925 is an apocalyptic number.

It is an amenable number.

390043925 is a deficient number, since it is larger than the sum of its proper divisors (93610573).

390043925 is a wasteful number, since it uses less digits than its factorization.

390043925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15601767 (or 15601762 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 390043925 is about 19749.5297412369. The cubic root of 390043925 is about 730.6417856378.

The spelling of 390043925 in words is "three hundred ninety million, forty-three thousand, nine hundred twenty-five".