390578738 has 16 divisors (see below), whose sum is σ = 639805824. Its totient is φ = 177347760.

The previous prime is 390578731. The next prime is 390578743. The reversal of 390578738 is 837875093.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390578731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13031 + ... + 30837.

It is an arithmetic number, because the mean of its divisors is an integer number (39987864).

Almost surely, 2^390578738 is an apocalyptic number.

390578738 is a deficient number, since it is larger than the sum of its proper divisors (249227086).

390578738 is a wasteful number, since it uses less digits than its factorization.

390578738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18817.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 390578738 is about 19763.0649950862. The cubic root of 390578738 is about 730.9755756201.

The spelling of 390578738 in words is "three hundred ninety million, five hundred seventy-eight thousand, seven hundred thirty-eight".