390641732 has 24 divisors (see below), whose sum is σ = 736948632. Its totient is φ = 180115200.

The previous prime is 390641731. The next prime is 390641749. The reversal of 390641732 is 237146093.

It can be written as a sum of positive squares in 4 ways, for example, as 36675136 + 353966596 = 6056^2 + 18814^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 390641692 and 390641701.

It is not an unprimeable number, because it can be changed into a prime (390641731) 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, 58232 + ... + 64592.

It is an arithmetic number, because the mean of its divisors is an integer number (30706193).

Almost surely, 2^390641732 is an apocalyptic number.

It is an amenable number.

390641732 is a deficient number, since it is larger than the sum of its proper divisors (346306900).

390641732 is a wasteful number, since it uses less digits than its factorization.

390641732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7557 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 390641732 is about 19764.6586613582. The cubic root of 390641732 is about 731.0148716660.

The spelling of 390641732 in words is "three hundred ninety million, six hundred forty-one thousand, seven hundred thirty-two".