390719972 has 6 divisors (see below), whose sum is σ = 683759958. Its totient is φ = 195359984.

The previous prime is 390719969. The next prime is 390720019. The reversal of 390719972 is 279917093.

It can be written as a sum of positive squares in only one way, i.e., 327103396 + 63616576 = 18086^2 + 7976^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48839993 + ... + 48840000.

It is an arithmetic number, because the mean of its divisors is an integer number (113959993).

Almost surely, 2^390719972 is an apocalyptic number.

It is an amenable number.

390719972 is a deficient number, since it is larger than the sum of its proper divisors (293039986).

390719972 is a wasteful number, since it uses less digits than its factorization.

390719972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97679997 (or 97679995 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 390719972 is about 19766.6378527052. The cubic root of 390719972 is about 731.0636723794.

The spelling of 390719972 in words is "three hundred ninety million, seven hundred nineteen thousand, nine hundred seventy-two".