393247928 has 32 divisors (see below), whose sum is σ = 771120000. Its totient is φ = 187654368.

The previous prime is 393247889. The next prime is 393247957. The reversal of 393247928 is 829742393.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89675 + ... + 93957.

It is an arithmetic number, because the mean of its divisors is an integer number (24097500).

Almost surely, 2^393247928 is an apocalyptic number.

It is an amenable number.

393247928 is a deficient number, since it is larger than the sum of its proper divisors (377872072).

393247928 is a wasteful number, since it uses less digits than its factorization.

393247928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811 (or 4807 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The square root of 393247928 is about 19830.4797723101. The cubic root of 393247928 is about 732.6369434932.

The spelling of 393247928 in words is "three hundred ninety-three million, two hundred forty-seven thousand, nine hundred twenty-eight".