172877680 has 20 divisors (see below), whose sum is σ = 401940792. Its totient is φ = 69151040.

The previous prime is 172877657. The next prime is 172877693. The reversal of 172877680 is 86778271.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 172877680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080406 + ... + 1080565.

Almost surely, 2^172877680 is an apocalyptic number.

172877680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172877680 is an abundant number, since it is smaller than the sum of its proper divisors (229063112).

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

172877680 is a wasteful number, since it uses less digits than its factorization.

172877680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160984 (or 2160978 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 46.

The square root of 172877680 is about 13148.2957070489. The cubic root of 172877680 is about 557.0741101738.

The spelling of 172877680 in words is "one hundred seventy-two million, eight hundred seventy-seven thousand, six hundred eighty".