172489632 has 96 divisors (see below), whose sum is σ = 519869952. Its totient is φ = 49054464.

The previous prime is 172489631. The next prime is 172489649. The reversal of 172489632 is 236984271.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (172489631) 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, 189723 + ... + 190629.

It is an arithmetic number, because the mean of its divisors is an integer number (5415312).

Almost surely, 2^172489632 is an apocalyptic number.

172489632 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 172489632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259934976).

172489632 is an abundant number, since it is smaller than the sum of its proper divisors (347380320).

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

172489632 is a wasteful number, since it uses less digits than its factorization.

172489632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1202 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 172489632 is about 13133.5308276183. The cubic root of 172489632 is about 556.6569878118.

The spelling of 172489632 in words is "one hundred seventy-two million, four hundred eighty-nine thousand, six hundred thirty-two".