397309212 has 30 divisors (see below), whose sum is σ = 1038645608. Its totient is φ = 132436296.

The previous prime is 397309201. The next prime is 397309259. The reversal of 397309212 is 212903793.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 612808 + ... + 613455.

Almost surely, 2^397309212 is an apocalyptic number.

It is an amenable number.

397309212 is an abundant number, since it is smaller than the sum of its proper divisors (641336396).

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

397309212 is a wasteful number, since it uses less digits than its factorization.

397309212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226279 (or 1226268 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 397309212 is about 19932.6167875671. The cubic root of 397309212 is about 735.1504231902.

The spelling of 397309212 in words is "three hundred ninety-seven million, three hundred nine thousand, two hundred twelve".