172107320 has 256 divisors, whose sum is σ = 541209600. Its totient is φ = 47554560.

The previous prime is 172107293. The next prime is 172107323. The reversal of 172107320 is 23701271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172107323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 994754 + ... + 994926.

It is an arithmetic number, because the mean of its divisors is an integer number (2114100).

Almost surely, 2^172107320 is an apocalyptic number.

172107320 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 172107320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270604800).

172107320 is an abundant number, since it is smaller than the sum of its proper divisors (369102280).

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

172107320 is a wasteful number, since it uses less digits than its factorization.

172107320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 172107320 is about 13118.9679472129. The cubic root of 172107320 is about 556.2454189750.

Adding to 172107320 its reverse (23701271), we get a palindrome (195808591).

The spelling of 172107320 in words is "one hundred seventy-two million, one hundred seven thousand, three hundred twenty".