172090884 has 48 divisors (see below), whose sum is σ = 461017088. Its totient is φ = 48943008.

The previous prime is 172090879. The next prime is 172090909. The reversal of 172090884 is 488090271.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14139 + ... + 23325.

Almost surely, 2^172090884 is an apocalyptic number.

172090884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172090884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230508544).

172090884 is an abundant number, since it is smaller than the sum of its proper divisors (288926204).

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

172090884 is a wasteful number, since it uses less digits than its factorization.

172090884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9424 (or 9422 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 172090884 is about 13118.3415110295. The cubic root of 172090884 is about 556.2277115338.

The spelling of 172090884 in words is "one hundred seventy-two million, ninety thousand, eight hundred eighty-four".