197881880 has 64 divisors (see below), whose sum is σ = 530979840. Its totient is φ = 64893312.

The previous prime is 197881823. The next prime is 197881907. The reversal of 197881880 is 88188791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8924 + ... + 21803.

It is an arithmetic number, because the mean of its divisors is an integer number (8296560).

Almost surely, 2^197881880 is an apocalyptic number.

197881880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197881880 is an abundant number, since it is smaller than the sum of its proper divisors (333097960).

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

197881880 is a wasteful number, since it uses less digits than its factorization.

197881880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30768 (or 30764 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 50.

The square root of 197881880 is about 14067.0494418695. The cubic root of 197881880 is about 582.7317429691.

The spelling of 197881880 in words is "one hundred ninety-seven million, eight hundred eighty-one thousand, eight hundred eighty".