397911328 has 12 divisors (see below), whose sum is σ = 783387990. Its totient is φ = 198955648.

The previous prime is 397911323. The next prime is 397911329. The reversal of 397911328 is 823119793.

It can be written as a sum of positive squares in only one way, i.e., 324432144 + 73479184 = 18012^2 + 8572^2 .

It is not an unprimeable number, because it can be changed into a prime (397911323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217333 + ... + 6217396.

Almost surely, 2^397911328 is an apocalyptic number.

It is an amenable number.

397911328 is a deficient number, since it is larger than the sum of its proper divisors (385476662).

397911328 is a wasteful number, since it uses less digits than its factorization.

397911328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12434739 (or 12434731 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 397911328 is about 19947.7148565945. The cubic root of 397911328 is about 735.5216054661.

The spelling of 397911328 in words is "three hundred ninety-seven million, nine hundred eleven thousand, three hundred twenty-eight".