393257492 has 12 divisors (see below), whose sum is σ = 689919636. Its totient is φ = 196137600.

The previous prime is 393257477. The next prime is 393257551. The reversal of 393257492 is 294752393.

It can be written as a sum of positive squares in 2 ways, for example, as 246992656 + 146264836 = 15716^2 + 12094^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120983 + ... + 124190.

It is an arithmetic number, because the mean of its divisors is an integer number (57493303).

Almost surely, 2^393257492 is an apocalyptic number.

It is an amenable number.

393257492 is a deficient number, since it is larger than the sum of its proper divisors (296662144).

393257492 is a wasteful number, since it uses less digits than its factorization.

393257492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245578 (or 245576 counting only the distinct ones).

The product of its digits is 408240, while the sum is 44.

The square root of 393257492 is about 19830.7209147827. The cubic root of 393257492 is about 732.6428828192.

The spelling of 393257492 in words is "three hundred ninety-three million, two hundred fifty-seven thousand, four hundred ninety-two".