397133172 has 48 divisors (see below), whose sum is σ = 1032669120. Its totient is φ = 131983776.

The previous prime is 397133167. The next prime is 397133183. The reversal of 397133172 is 271331793.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32178 + ... + 42774.

It is an arithmetic number, because the mean of its divisors is an integer number (21513940).

Almost surely, 2^397133172 is an apocalyptic number.

It is an amenable number.

397133172 is an abundant number, since it is smaller than the sum of its proper divisors (635535948).

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

397133172 is a wasteful number, since it uses less digits than its factorization.

397133172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957 (or 10949 counting only the distinct ones).

The product of its digits is 23814, while the sum is 36.

The square root of 397133172 is about 19928.2004205096. The cubic root of 397133172 is about 735.0418301891.

The spelling of 397133172 in words is "three hundred ninety-seven million, one hundred thirty-three thousand, one hundred seventy-two".