390561938 has 16 divisors (see below), whose sum is σ = 638897280. Its totient is φ = 177976656.

The previous prime is 390561931. The next prime is 390561979. The reversal of 390561938 is 839165093.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (390561931) 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, 93020 + ... + 97127.

It is an arithmetic number, because the mean of its divisors is an integer number (39931080).

Almost surely, 2^390561938 is an apocalyptic number.

390561938 is a deficient number, since it is larger than the sum of its proper divisors (248335342).

390561938 is a wasteful number, since it uses less digits than its factorization.

390561938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190241.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 390561938 is about 19762.6399552287. The cubic root of 390561938 is about 730.9650949628.

The spelling of 390561938 in words is "three hundred ninety million, five hundred sixty-one thousand, nine hundred thirty-eight".