172280532 has 72 divisors (see below), whose sum is σ = 427082656. Its totient is φ = 54020736.

The previous prime is 172280501. The next prime is 172280539. The reversal of 172280532 is 235082271.

It is a self number, because there is not a number n which added to its sum of digits gives 172280532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172280539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433758 + ... + 434154.

Almost surely, 2^172280532 is an apocalyptic number.

172280532 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 172280532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213541328).

172280532 is an abundant number, since it is smaller than the sum of its proper divisors (254802124).

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

172280532 is a wasteful number, since it uses less digits than its factorization.

172280532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 172280532 is about 13125.5678734293. The cubic root of 172280532 is about 556.4319616456.

The spelling of 172280532 in words is "one hundred seventy-two million, two hundred eighty thousand, five hundred thirty-two".