172706772 has 72 divisors (see below), whose sum is σ = 470564640. Its totient is φ = 49156800.

The previous prime is 172706759. The next prime is 172706773. The reversal of 172706772 is 277607271.

172706772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 172706772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172706773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246022 + ... + 246722.

It is an arithmetic number, because the mean of its divisors is an integer number (6535620).

Almost surely, 2^172706772 is an apocalyptic number.

172706772 is a gapful number since it is divisible by the number (12) 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 172706772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235282320).

172706772 is an abundant number, since it is smaller than the sum of its proper divisors (297857868).

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

172706772 is a wasteful number, since it uses less digits than its factorization.

172706772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 39.

The square root of 172706772 is about 13141.7948545851. The cubic root of 172706772 is about 556.8904739484.

It can be divided in two parts, 17270 and 6772, that added together give a palindrome (24042).

The spelling of 172706772 in words is "one hundred seventy-two million, seven hundred six thousand, seven hundred seventy-two".