172666032 has 240 divisors, whose sum is σ = 582629376. Its totient is φ = 43084800.

The previous prime is 172666009. The next prime is 172666033. The reversal of 172666032 is 230666271.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 172665984 and 172666002.

It is not an unprimeable number, because it can be changed into a prime (172666033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1260268 + ... + 1260404.

Almost surely, 2^172666032 is an apocalyptic number.

172666032 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 172666032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291314688).

172666032 is an abundant number, since it is smaller than the sum of its proper divisors (409963344).

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

172666032 is a wasteful number, since it uses less digits than its factorization.

172666032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 172666032 is about 13140.2447465791. The cubic root of 172666032 is about 556.8466819924.

The spelling of 172666032 in words is "one hundred seventy-two million, six hundred sixty-six thousand, thirty-two".