393424872 has 16 divisors (see below), whose sum is σ = 983562240. Its totient is φ = 131141616.

The previous prime is 393424859. The next prime is 393424873. The reversal of 393424872 is 278424393.

It is not an unprimeable number, because it can be changed into a prime (393424873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8196328 + ... + 8196375.

It is an arithmetic number, because the mean of its divisors is an integer number (61472640).

Almost surely, 2^393424872 is an apocalyptic number.

It is an amenable number.

393424872 is an abundant number, since it is smaller than the sum of its proper divisors (590137368).

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

393424872 is a wasteful number, since it uses less digits than its factorization.

393424872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16392712 (or 16392708 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 393424872 is about 19834.9406855680. The cubic root of 393424872 is about 732.7468116481.

The spelling of 393424872 in words is "three hundred ninety-three million, four hundred twenty-four thousand, eight hundred seventy-two".