172691968 has 40 divisors (see below), whose sum is σ = 346428720. Its totient is φ = 86000640.

The previous prime is 172691957. The next prime is 172692017. The reversal of 172691968 is 869196271.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168963 + ... + 169981.

It is an arithmetic number, because the mean of its divisors is an integer number (8660718).

Almost surely, 2^172691968 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 172691968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173214360).

172691968 is an abundant number, since it is smaller than the sum of its proper divisors (173736752).

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

172691968 is an equidigital number, since it uses as much as digits as its factorization.

172691968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1352 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The square root of 172691968 is about 13141.2316013378. The cubic root of 172691968 is about 556.8745617329.

The spelling of 172691968 in words is "one hundred seventy-two million, six hundred ninety-one thousand, nine hundred sixty-eight".