393960520 has 32 divisors (see below), whose sum is σ = 887008320. Its totient is φ = 157478080.

The previous prime is 393960481. The next prime is 393960527. The reversal of 393960520 is 25069393.

It is a self number, because there is not a number n which added to its sum of digits gives 393960520.

It is not an unprimeable number, because it can be changed into a prime (393960527) 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, 87525 + ... + 91915.

It is an arithmetic number, because the mean of its divisors is an integer number (27719010).

Almost surely, 2^393960520 is an apocalyptic number.

It is an amenable number.

393960520 is an abundant number, since it is smaller than the sum of its proper divisors (493047800).

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

393960520 is a wasteful number, since it uses less digits than its factorization.

393960520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6641 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 393960520 is about 19848.4387295324. The cubic root of 393960520 is about 733.0792057930.

The spelling of 393960520 in words is "three hundred ninety-three million, nine hundred sixty thousand, five hundred twenty".