390390874 has 12 divisors (see below), whose sum is σ = 605088522. Its totient is φ = 188897880.

The previous prime is 390390827. The next prime is 390390881. The reversal of 390390874 is 478093093.

It can be written as a sum of positive squares in only one way, i.e., 328878225 + 61512649 = 18135^2 + 7843^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 390390874.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99637 + ... + 103480.

Almost surely, 2^390390874 is an apocalyptic number.

390390874 is a deficient number, since it is larger than the sum of its proper divisors (214697648).

390390874 is a wasteful number, since it uses less digits than its factorization.

390390874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203181 (or 203150 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 390390874 is about 19758.3115169288. The cubic root of 390390874 is about 730.8583598023.

The spelling of 390390874 in words is "three hundred ninety million, three hundred ninety thousand, eight hundred seventy-four".