390489832 has 8 divisors (see below), whose sum is σ = 732168450. Its totient is φ = 195244912.

The previous prime is 390489829. The next prime is 390489833. The reversal of 390489832 is 238984093.

It can be written as a sum of positive squares in only one way, i.e., 282038436 + 108451396 = 16794^2 + 10414^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (390489833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24405607 + ... + 24405622.

Almost surely, 2^390489832 is an apocalyptic number.

It is an amenable number.

390489832 is a deficient number, since it is larger than the sum of its proper divisors (341678618).

390489832 is a wasteful number, since it uses less digits than its factorization.

390489832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48811235 (or 48811231 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 390489832 is about 19760.8155702137. The cubic root of 390489832 is about 730.9201083183.

The spelling of 390489832 in words is "three hundred ninety million, four hundred eighty-nine thousand, eight hundred thirty-two".