397938312 has 128 divisors (see below), whose sum is σ = 1177545600. Its totient is φ = 124084224.

The previous prime is 397938287. The next prime is 397938353. The reversal of 397938312 is 213839793.

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 31 ways as a sum of consecutive naturals, for example, 1127128 + ... + 1127480.

It is an arithmetic number, because the mean of its divisors is an integer number (9199575).

Almost surely, 2^397938312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397938312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588772800).

397938312 is an abundant number, since it is smaller than the sum of its proper divisors (779607288).

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

397938312 is a wasteful number, since it uses less digits than its factorization.

397938312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 682 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 397938312 is about 19948.3912133285. The cubic root of 397938312 is about 735.5382313364.

The spelling of 397938312 in words is "three hundred ninety-seven million, nine hundred thirty-eight thousand, three hundred twelve".