397831216 has 20 divisors (see below), whose sum is σ = 774457624. Its totient is φ = 197971200.

The previous prime is 397831211. The next prime is 397831237. The reversal of 397831216 is 612138793.

It is not an unprimeable number, because it can be changed into a prime (397831211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55545 + ... + 62296.

Almost surely, 2^397831216 is an apocalyptic number.

It is an amenable number.

397831216 is a deficient number, since it is larger than the sum of its proper divisors (376626408).

397831216 is a wasteful number, since it uses less digits than its factorization.

397831216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118060 (or 118054 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 397831216 is about 19945.7067059555. The cubic root of 397831216 is about 735.4722409824.

The spelling of 397831216 in words is "three hundred ninety-seven million, eight hundred thirty-one thousand, two hundred sixteen".