197621880 has 32 divisors (see below), whose sum is σ = 592866000. Its totient is φ = 52699136.

The previous prime is 197621873. The next prime is 197621899. The reversal of 197621880 is 88126791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823305 + ... + 823544.

Almost surely, 2^197621880 is an apocalyptic number.

197621880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197621880 is an abundant number, since it is smaller than the sum of its proper divisors (395244120).

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

197621880 is a wasteful number, since it uses less digits than its factorization.

197621880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646863 (or 1646859 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 197621880 is about 14057.8049495645. The cubic root of 197621880 is about 582.4764110865.

The spelling of 197621880 in words is "one hundred ninety-seven million, six hundred twenty-one thousand, eight hundred eighty".