172725620 has 48 divisors (see below), whose sum is σ = 381680208. Its totient is φ = 65571840.

The previous prime is 172725613. The next prime is 172725629. The reversal of 172725620 is 26527271.

172725620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 19114384 + 153611236 = 4372^2 + 12394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172725629) 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, 27494 + ... + 33186.

It is an arithmetic number, because the mean of its divisors is an integer number (7951671).

Almost surely, 2^172725620 is an apocalyptic number.

172725620 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 172725620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190840104).

172725620 is an abundant number, since it is smaller than the sum of its proper divisors (208954588).

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

172725620 is a wasteful number, since it uses less digits than its factorization.

172725620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780 (or 5778 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 172725620 is about 13142.5119364602. The cubic root of 172725620 is about 556.9107315788.

The spelling of 172725620 in words is "one hundred seventy-two million, seven hundred twenty-five thousand, six hundred twenty".