390071925 has 18 divisors (see below), whose sum is σ = 698662562. Its totient is φ = 208038240.

The previous prime is 390071921. The next prime is 390071933. The reversal of 390071925 is 529170093.

It can be written as a sum of positive squares in 3 ways, for example, as 68013009 + 322058916 = 8247^2 + 17946^2 .

It is not a de Polignac number, because 390071925 - 2² = 390071921 is a prime.

It is a super-2 number, since 2×390071925² = 304312213346411250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390071925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390071921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 866602 + ... + 867051.

Almost surely, 2^390071925 is an apocalyptic number.

It is an amenable number.

390071925 is a deficient number, since it is larger than the sum of its proper divisors (308590637).

390071925 is a wasteful number, since it uses less digits than its factorization.

390071925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733669 (or 1733661 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 390071925 is about 19750.2386061536. The cubic root of 390071925 is about 730.6592686948.

The spelling of 390071925 in words is "three hundred ninety million, seventy-one thousand, nine hundred twenty-five".