172874520 has 256 divisors, whose sum is σ = 709632000. Its totient is φ = 36453888.

The previous prime is 172874501. The next prime is 172874551. The reversal of 172874520 is 25478271.

172874520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97401 + ... + 99159.

It is an arithmetic number, because the mean of its divisors is an integer number (2772000).

Almost surely, 2^172874520 is an apocalyptic number.

172874520 is a gapful number since it is divisible by the number (10) 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 172874520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354816000).

172874520 is an abundant number, since it is smaller than the sum of its proper divisors (536757480).

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

172874520 is a wasteful number, since it uses less digits than its factorization.

172874520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 172874520 is about 13148.1755388343. The cubic root of 172874520 is about 557.0707159340.

The spelling of 172874520 in words is "one hundred seventy-two million, eight hundred seventy-four thousand, five hundred twenty".