172530240 has 56 divisors (see below), whose sum is σ = 547786560. Its totient is φ = 46007808.

The previous prime is 172530217. The next prime is 172530247. The reversal of 172530240 is 42035271.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 172530240.

It is not an unprimeable number, because it can be changed into a prime (172530247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88900 + ... + 90819.

Almost surely, 2^172530240 is an apocalyptic number.

172530240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172530240 is an abundant number, since it is smaller than the sum of its proper divisors (375256320).

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

172530240 is a wasteful number, since it uses less digits than its factorization.

172530240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179739 (or 179729 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 172530240 is about 13135.0767032401. The cubic root of 172530240 is about 556.7006676416.

The spelling of 172530240 in words is "one hundred seventy-two million, five hundred thirty thousand, two hundred forty".