172732230 has 128 divisors (see below), whose sum is σ = 529113600. Its totient is φ = 39657600.

The previous prime is 172732201. The next prime is 172732237. The reversal of 172732230 is 32237271.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172732194 and 172732203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172732237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54900 + ... + 57960.

It is an arithmetic number, because the mean of its divisors is an integer number (4133700).

Almost surely, 2^172732230 is an apocalyptic number.

172732230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172732230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264556800).

172732230 is an abundant number, since it is smaller than the sum of its proper divisors (356381370).

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

172732230 is a wasteful number, since it uses less digits than its factorization.

172732230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3101 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 172732230 is about 13142.7634080508. The cubic root of 172732230 is about 556.9178355876.

It can be divided in two parts, 17273 and 2230, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 172732230 in words is "one hundred seventy-two million, seven hundred thirty-two thousand, two hundred thirty".