172494870 has 32 divisors (see below), whose sum is σ = 418093920. Its totient is φ = 45542400.

The previous prime is 172494853. The next prime is 172494877. The reversal of 172494870 is 78494271.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172494877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25435 + ... + 31494.

It is an arithmetic number, because the mean of its divisors is an integer number (13065435).

Almost surely, 2^172494870 is an apocalyptic number.

172494870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172494870 is an abundant number, since it is smaller than the sum of its proper divisors (245599050).

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

172494870 is a wasteful number, since it uses less digits than its factorization.

172494870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57040.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 172494870 is about 13133.7302393494. The cubic root of 172494870 is about 556.6626224303.

The spelling of 172494870 in words is "one hundred seventy-two million, four hundred ninety-four thousand, eight hundred seventy".