393997416 has 32 divisors (see below), whose sum is σ = 985662240. Its totient is φ = 131243328.

The previous prime is 393997403. The next prime is 393997441. The reversal of 393997416 is 614799393.

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, 37230 + ... + 46626.

It is an arithmetic number, because the mean of its divisors is an integer number (30801945).

Almost surely, 2^393997416 is an apocalyptic number.

It is an amenable number.

393997416 is an abundant number, since it is smaller than the sum of its proper divisors (591664824).

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

393997416 is a wasteful number, since it uses less digits than its factorization.

393997416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11153 (or 11149 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 51.

The square root of 393997416 is about 19849.3681511528. The cubic root of 393997416 is about 733.1020903586.

The spelling of 393997416 in words is "three hundred ninety-three million, nine hundred ninety-seven thousand, four hundred sixteen".