172032660 has 120 divisors (see below), whose sum is σ = 545440896. Its totient is φ = 45385920.

The previous prime is 172032607. The next prime is 172032661. The reversal of 172032660 is 66230271.

It is a happy number.

It is a super-2 number, since 2×172032660² = 59190472213351200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172032661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 166345 + ... + 167375.

Almost surely, 2^172032660 is an apocalyptic number.

172032660 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 172032660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272720448).

172032660 is an abundant number, since it is smaller than the sum of its proper divisors (373408236).

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

172032660 is a wasteful number, since it uses less digits than its factorization.

172032660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 172032660 is about 13116.1221403279. The cubic root of 172032660 is about 556.1649744215.

The spelling of 172032660 in words is "one hundred seventy-two million, thirty-two thousand, six hundred sixty".