172688080 has 20 divisors (see below), whose sum is σ = 401499972. Its totient is φ = 69075200.

The previous prime is 172688077. The next prime is 172688099. The reversal of 172688080 is 80886271.

It can be written as a sum of positive squares in 2 ways, for example, as 80066704 + 92621376 = 8948^2 + 9624^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 1079221 + ... + 1079380.

Almost surely, 2^172688080 is an apocalyptic number.

172688080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172688080 is an abundant number, since it is smaller than the sum of its proper divisors (228811892).

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

172688080 is a wasteful number, since it uses less digits than its factorization.

172688080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158614 (or 2158608 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 172688080 is about 13141.0836691652. The cubic root of 172688080 is about 556.8703825295.

The spelling of 172688080 in words is "one hundred seventy-two million, six hundred eighty-eight thousand, eighty".