197638808 has 16 divisors (see below), whose sum is σ = 373853880. Its totient is φ = 97944448.

The previous prime is 197638801. The next prime is 197638823. The reversal of 197638808 is 808836791.

It is a happy number.

It is a super-2 number, since 2×197638808² = 78122196855321728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197638801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108410 + ... + 110217.

Almost surely, 2^197638808 is an apocalyptic number.

It is an amenable number.

197638808 is a deficient number, since it is larger than the sum of its proper divisors (176215072).

197638808 is a wasteful number, since it uses less digits than its factorization.

197638808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218746 (or 218742 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 197638808 is about 14058.4070221345. The cubic root of 197638808 is about 582.4930419696.

The spelling of 197638808 in words is "one hundred ninety-seven million, six hundred thirty-eight thousand, eight hundred eight".