397690332 has 96 divisors (see below), whose sum is σ = 1049180160. Its totient is φ = 116328960.

The previous prime is 397690327. The next prime is 397690357. The reversal of 397690332 is 233096793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 972144 + ... + 972552.

It is an arithmetic number, because the mean of its divisors is an integer number (10928960).

Almost surely, 2^397690332 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 397690332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524590080).

397690332 is an abundant number, since it is smaller than the sum of its proper divisors (651489828).

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

397690332 is a wasteful number, since it uses less digits than its factorization.

397690332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 42.

The square root of 397690332 is about 19942.1747058840. The cubic root of 397690332 is about 735.3854131179.

The spelling of 397690332 in words is "three hundred ninety-seven million, six hundred ninety thousand, three hundred thirty-two".