397157616 has 60 divisors (see below), whose sum is σ = 1147357120. Its totient is φ = 128113920.

The previous prime is 397157591. The next prime is 397157617. The reversal of 397157616 is 616751793.

397157616 is a `hidden beast` number, since 3 + 9 + 71 + 576 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397157617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40021 + ... + 48948.

Almost surely, 2^397157616 is an apocalyptic number.

397157616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

397157616 is an abundant number, since it is smaller than the sum of its proper divisors (750199504).

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

397157616 is a wasteful number, since it uses less digits than its factorization.

397157616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89014 (or 89005 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 397157616 is about 19928.8137128129. The cubic root of 397157616 is about 735.0569107675.

The spelling of 397157616 in words is "three hundred ninety-seven million, one hundred fifty-seven thousand, six hundred sixteen".