172315860 has 48 divisors (see below), whose sum is σ = 486029376. Its totient is φ = 45613312.

The previous prime is 172315853. The next prime is 172315867. The reversal of 172315860 is 68513271.

It is an interprime number because it is at equal distance from previous prime (172315853) and next prime (172315867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172315867) 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, 2262 + ... + 18701.

It is an arithmetic number, because the mean of its divisors is an integer number (10125612).

Almost surely, 2^172315860 is an apocalyptic number.

172315860 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 172315860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243014688).

172315860 is an abundant number, since it is smaller than the sum of its proper divisors (313713516).

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

172315860 is a wasteful number, since it uses less digits than its factorization.

172315860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21112 (or 21110 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 172315860 is about 13126.9135747898. The cubic root of 172315860 is about 556.4699931914.

The spelling of 172315860 in words is "one hundred seventy-two million, three hundred fifteen thousand, eight hundred sixty".