172370928 has 80 divisors (see below), whose sum is σ = 454926240. Its totient is φ = 56229888.

The previous prime is 172370927. The next prime is 172370941. The reversal of 172370928 is 829073271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172370921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670576 + ... + 670832.

It is an arithmetic number, because the mean of its divisors is an integer number (5686578).

Almost surely, 2^172370928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172370928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227463120).

172370928 is an abundant number, since it is smaller than the sum of its proper divisors (282555312).

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

172370928 is a wasteful number, since it uses less digits than its factorization.

172370928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 172370928 is about 13129.0109299977. The cubic root of 172370928 is about 556.5292650151.

The spelling of 172370928 in words is "one hundred seventy-two million, three hundred seventy thousand, nine hundred twenty-eight".