397181952 has 132 divisors (see below), whose sum is σ = 1164923136. Its totient is φ = 130314240.

The previous prime is 397181933. The next prime is 397181957. The reversal of 397181952 is 259181793.

It is a junction number, because it is equal to n+sod(n) for n = 397181898 and 397181907.

It is not an unprimeable number, because it can be changed into a prime (397181957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654033 + ... + 654639.

Almost surely, 2^397181952 is an apocalyptic number.

397181952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397181952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582461568).

397181952 is an abundant number, since it is smaller than the sum of its proper divisors (767741184).

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

397181952 is a wasteful number, since it uses less digits than its factorization.

397181952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 683 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 397181952 is about 19929.4242766820. The cubic root of 397181952 is about 735.0719241014.

The spelling of 397181952 in words is "three hundred ninety-seven million, one hundred eighty-one thousand, nine hundred fifty-two".