390238490 has 16 divisors (see below), whose sum is σ = 703117800. Its totient is φ = 155942400.

The previous prime is 390238477. The next prime is 390238501. The reversal of 390238490 is 94832093.

It can be written as a sum of positive squares in 4 ways, for example, as 298978681 + 91259809 = 17291^2 + 9553^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8111 + ... + 29090.

Almost surely, 2^390238490 is an apocalyptic number.

390238490 is a deficient number, since it is larger than the sum of its proper divisors (312879310).

390238490 is a wasteful number, since it uses less digits than its factorization.

390238490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38257.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 390238490 is about 19754.4549405950. The cubic root of 390238490 is about 730.7632537419.

The spelling of 390238490 in words is "three hundred ninety million, two hundred thirty-eight thousand, four hundred ninety".