397291160 has 64 divisors (see below), whose sum is σ = 1025766720. Its totient is φ = 135659520.

The previous prime is 397291099. The next prime is 397291171. The reversal of 397291160 is 61192793.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69200 + ... + 74720.

It is an arithmetic number, because the mean of its divisors is an integer number (16027605).

Almost surely, 2^397291160 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 397291160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512883360).

397291160 is an abundant number, since it is smaller than the sum of its proper divisors (628475560).

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

397291160 is a wasteful number, since it uses less digits than its factorization.

397291160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796 (or 5792 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 397291160 is about 19932.1639567810. The cubic root of 397291160 is about 735.1392890105.

The spelling of 397291160 in words is "three hundred ninety-seven million, two hundred ninety-one thousand, one hundred sixty".