393680072 has 16 divisors (see below), whose sum is σ = 741900060. Its totient is φ = 195840064.

The previous prime is 393680069. The next prime is 393680107. The reversal of 393680072 is 270086393.

It can be written as a sum of positive squares in 2 ways, for example, as 363054916 + 30625156 = 19054^2 + 5534^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123323 + ... + 126474.

Almost surely, 2^393680072 is an apocalyptic number.

It is an amenable number.

393680072 is a deficient number, since it is larger than the sum of its proper divisors (348219988).

393680072 is a wasteful number, since it uses less digits than its factorization.

393680072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250000 (or 249996 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 393680072 is about 19841.3727347681. The cubic root of 393680072 is about 732.9052125539.

The spelling of 393680072 in words is "three hundred ninety-three million, six hundred eighty thousand, seventy-two".