397815196 has 12 divisors (see below), whose sum is σ = 696320352. Its totient is φ = 198866528.

The previous prime is 397815163. The next prime is 397815211. The reversal of 397815196 is 691518793.

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 3 ways as a sum of consecutive naturals, for example, 24936 + ... + 37648.

It is an arithmetic number, because the mean of its divisors is an integer number (58026696).

Almost surely, 2^397815196 is an apocalyptic number.

It is an amenable number.

397815196 is a deficient number, since it is larger than the sum of its proper divisors (298505156).

397815196 is a wasteful number, since it uses less digits than its factorization.

397815196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20540 (or 20538 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The square root of 397815196 is about 19945.3051117299. The cubic root of 397815196 is about 735.4623687695.

The spelling of 397815196 in words is "three hundred ninety-seven million, eight hundred fifteen thousand, one hundred ninety-six".