172197880 has 32 divisors (see below), whose sum is σ = 392356800. Its totient is φ = 68006016.

The previous prime is 172197877. The next prime is 172197899. The reversal of 172197880 is 88791271.

It is a happy number.

172197880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 24087 + ... + 30406.

It is an arithmetic number, because the mean of its divisors is an integer number (12261150).

Almost surely, 2^172197880 is an apocalyptic number.

172197880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172197880 is an abundant number, since it is smaller than the sum of its proper divisors (220158920).

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

172197880 is a wasteful number, since it uses less digits than its factorization.

172197880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54583 (or 54579 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 172197880 is about 13122.4189843184. The cubic root of 172197880 is about 556.3429642208.

The spelling of 172197880 in words is "one hundred seventy-two million, one hundred ninety-seven thousand, eight hundred eighty".