397297736 has 32 divisors (see below), whose sum is σ = 838874880. Its totient is φ = 174763200.

The previous prime is 397297727. The next prime is 397297781. The reversal of 397297736 is 637792793.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70091 + ... + 75546.

It is an arithmetic number, because the mean of its divisors is an integer number (26214840).

Almost surely, 2^397297736 is an apocalyptic number.

It is an amenable number.

397297736 is an abundant number, since it is smaller than the sum of its proper divisors (441577144).

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

397297736 is a wasteful number, since it uses less digits than its factorization.

397297736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145685 (or 145681 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 53.

The square root of 397297736 is about 19932.3289156084. The cubic root of 397297736 is about 735.1433450193.

The spelling of 397297736 in words is "three hundred ninety-seven million, two hundred ninety-seven thousand, seven hundred thirty-six".