197696638 has 32 divisors (see below), whose sum is σ = 329313600. Its totient is φ = 88535040.

The previous prime is 197696593. The next prime is 197696663. The reversal of 197696638 is 836696791.

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, 187938 + ... + 188986.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^197696638 is an apocalyptic number.

197696638 is a deficient number, since it is larger than the sum of its proper divisors (131616962).

197696638 is a wasteful number, since it uses less digits than its factorization.

197696638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 2939328, while the sum is 55.

The square root of 197696638 is about 14060.4636481163. The cubic root of 197696638 is about 582.5498497865.

The spelling of 197696638 in words is "one hundred ninety-seven million, six hundred ninety-six thousand, six hundred thirty-eight".