172001872 has 40 divisors (see below), whose sum is σ = 381672000. Its totient is φ = 73558272.

The previous prime is 172001867. The next prime is 172001887. The reversal of 172001872 is 278100271.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 172001872.

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, 62379 + ... + 65077.

It is an arithmetic number, because the mean of its divisors is an integer number (9541800).

Almost surely, 2^172001872 is an apocalyptic number.

It is an amenable number.

172001872 is an abundant number, since it is smaller than the sum of its proper divisors (209670128).

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

172001872 is a wasteful number, since it uses less digits than its factorization.

172001872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 172001872 is about 13114.9484177407. The cubic root of 172001872 is about 556.1317942319.

The spelling of 172001872 in words is "one hundred seventy-two million, one thousand, eight hundred seventy-two".