397729132 has 24 divisors (see below), whose sum is σ = 737905280. Its totient is φ = 187246080.

The previous prime is 397729117. The next prime is 397729141. The reversal of 397729132 is 231927793.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38757 + ... + 47932.

Almost surely, 2^397729132 is an apocalyptic number.

It is an amenable number.

397729132 is a deficient number, since it is larger than the sum of its proper divisors (340176148).

397729132 is a wasteful number, since it uses less digits than its factorization.

397729132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86761 (or 86759 counting only the distinct ones).

The product of its digits is 142884, while the sum is 43.

The square root of 397729132 is about 19943.1474948164. The cubic root of 397729132 is about 735.4093278943.

The spelling of 397729132 in words is "three hundred ninety-seven million, seven hundred twenty-nine thousand, one hundred thirty-two".