172722270 has 64 divisors (see below), whose sum is σ = 475600896. Its totient is φ = 39325440.

The previous prime is 172722269. The next prime is 172722281. The reversal of 172722270 is 72227271.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57547 + ... + 60473.

It is an arithmetic number, because the mean of its divisors is an integer number (7431264).

Almost surely, 2^172722270 is an apocalyptic number.

172722270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172722270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237800448).

172722270 is an abundant number, since it is smaller than the sum of its proper divisors (302878626).

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

172722270 is a wasteful number, since it uses less digits than its factorization.

172722270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 172722270 is about 13142.3844868426. The cubic root of 172722270 is about 556.9071311420.

The spelling of 172722270 in words is "one hundred seventy-two million, seven hundred twenty-two thousand, two hundred seventy".