393047920 has 40 divisors (see below), whose sum is σ = 953572896. Its totient is φ = 150382848.

The previous prime is 393047909. The next prime is 393047923. The reversal of 393047920 is 29740393.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 393047920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393047923) 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, 104967 + ... + 108646.

Almost surely, 2^393047920 is an apocalyptic number.

It is an amenable number.

393047920 is an abundant number, since it is smaller than the sum of its proper divisors (560524976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

393047920 is a wasteful number, since it uses less digits than its factorization.

393047920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213649 (or 213643 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 393047920 is about 19825.4361868787. The cubic root of 393047920 is about 732.5127147401.

The spelling of 393047920 in words is "three hundred ninety-three million, forty-seven thousand, nine hundred twenty".