397979392 has 36 divisors (see below), whose sum is σ = 800724736. Its totient is φ = 197406720.

The previous prime is 397979389. The next prime is 397979411. The reversal of 397979392 is 293979793.

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, 26392 + ... + 38632.

Almost surely, 2^397979392 is an apocalyptic number.

397979392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397979392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400362368).

397979392 is an abundant number, since it is smaller than the sum of its proper divisors (402745344).

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

397979392 is a wasteful number, since it uses less digits than its factorization.

397979392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12384 (or 12370 counting only the distinct ones).

The product of its digits is 5786802, while the sum is 58.

The square root of 397979392 is about 19949.4208437238. The cubic root of 397979392 is about 735.5635408462.

The spelling of 397979392 in words is "three hundred ninety-seven million, nine hundred seventy-nine thousand, three hundred ninety-two".