197639880 has 64 divisors (see below), whose sum is σ = 612057600. Its totient is φ = 51002880.

The previous prime is 197639879. The next prime is 197639887. The reversal of 197639880 is 88936791.

It is not an unprimeable number, because it can be changed into a prime (197639887) by changing a digit.

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, 22845 + ... + 30284.

It is an arithmetic number, because the mean of its divisors is an integer number (9563400).

Almost surely, 2^197639880 is an apocalyptic number.

197639880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197639880 is an abundant number, since it is smaller than the sum of its proper divisors (414417720).

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

197639880 is a wasteful number, since it uses less digits than its factorization.

197639880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53174 (or 53170 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 197639880 is about 14058.4451487353. The cubic root of 197639880 is about 582.4940951221.

The spelling of 197639880 in words is "one hundred ninety-seven million, six hundred thirty-nine thousand, eight hundred eighty".