172020288 has 112 divisors (see below), whose sum is σ = 503285760. Its totient is φ = 51417600.

The previous prime is 172020287. The next prime is 172020293. The reversal of 172020288 is 882020271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (172020283) 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, 166333 + ... + 167363.

Almost surely, 2^172020288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172020288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251642880).

172020288 is an abundant number, since it is smaller than the sum of its proper divisors (331265472).

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

172020288 is a wasteful number, since it uses less digits than its factorization.

172020288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 172020288 is about 13115.6504985456. The cubic root of 172020288 is about 556.1516416082.

The spelling of 172020288 in words is "one hundred seventy-two million, twenty thousand, two hundred eighty-eight".