172794072 has 64 divisors (see below), whose sum is σ = 478339200. Its totient is φ = 51575040.

The previous prime is 172794053. The next prime is 172794073. The reversal of 172794072 is 270497271.

It is a self number, because there is not a number n which added to its sum of digits gives 172794072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172794073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12804 + ... + 22572.

It is an arithmetic number, because the mean of its divisors is an integer number (7474050).

Almost surely, 2^172794072 is an apocalyptic number.

172794072 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 172794072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239169600).

172794072 is an abundant number, since it is smaller than the sum of its proper divisors (305545128).

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

172794072 is a wasteful number, since it uses less digits than its factorization.

172794072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856 (or 9852 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 172794072 is about 13145.1158990707. The cubic root of 172794072 is about 556.9842906694.

The spelling of 172794072 in words is "one hundred seventy-two million, seven hundred ninety-four thousand, seventy-two".