390993632 has 24 divisors (see below), whose sum is σ = 772780176. Its totient is φ = 194732032.

The previous prime is 390993623. The next prime is 390993637. The reversal of 390993632 is 236399093.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390993637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15548 + ... + 31995.

It is an arithmetic number, because the mean of its divisors is an integer number (32199174).

Almost surely, 2^390993632 is an apocalyptic number.

390993632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

390993632 is a deficient number, since it is larger than the sum of its proper divisors (381786544).

390993632 is a wasteful number, since it uses less digits than its factorization.

390993632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47810 (or 47802 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 44.

The square root of 390993632 is about 19773.5589108284. The cubic root of 390993632 is about 731.2343113784.

The spelling of 390993632 in words is "three hundred ninety million, nine hundred ninety-three thousand, six hundred thirty-two".