393949392 has 40 divisors (see below), whose sum is σ = 1018658016. Its totient is φ = 131193216.

The previous prime is 393949373. The next prime is 393949399. The reversal of 393949392 is 293949393.

It is a super-2 number, since 2×393949392² = 310392246914339328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393949399) 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, 58083 + ... + 64509.

Almost surely, 2^393949392 is an apocalyptic number.

It is an amenable number.

393949392 is an abundant number, since it is smaller than the sum of its proper divisors (624708624).

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

393949392 is a wasteful number, since it uses less digits than its factorization.

393949392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715 (or 7709 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 51.

The square root of 393949392 is about 19848.1584032373. The cubic root of 393949392 is about 733.0723034244.

Subtracting from 393949392 its reverse (293949393), we obtain a palindrome (99999999).

The spelling of 393949392 in words is "three hundred ninety-three million, nine hundred forty-nine thousand, three hundred ninety-two".