172228032 has 70 divisors (see below), whose sum is σ = 510553208. Its totient is φ = 57407616.

The previous prime is 172228019. The next prime is 172228039. The reversal of 172228032 is 230822271.

It is a happy number.

172228032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 172227987 and 172228005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172228039) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11428 + ... + 21795.

Almost surely, 2^172228032 is an apocalyptic number.

172228032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172228032 is an abundant number, since it is smaller than the sum of its proper divisors (338325176).

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

172228032 is an equidigital number, since it uses as much as digits as its factorization.

172228032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33247 (or 33228 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 172228032 is about 13123.5678075743. The cubic root of 172228032 is about 556.3754343729.

The spelling of 172228032 in words is "one hundred seventy-two million, two hundred twenty-eight thousand, thirty-two".