172387272 has 32 divisors (see below), whose sum is σ = 435002400. Its totient is φ = 56924544.

The previous prime is 172387261. The next prime is 172387273. The reversal of 172387272 is 272783271.

It is a self number, because there is not a number n which added to its sum of digits gives 172387272.

It is not an unprimeable number, because it can be changed into a prime (172387273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30997 + ... + 36132.

It is an arithmetic number, because the mean of its divisors is an integer number (13593825).

Almost surely, 2^172387272 is an apocalyptic number.

172387272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172387272 is an abundant number, since it is smaller than the sum of its proper divisors (262615128).

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

172387272 is a wasteful number, since it uses less digits than its factorization.

172387272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67245 (or 67241 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 172387272 is about 13129.6333536013. The cubic root of 172387272 is about 556.5468542667.

The spelling of 172387272 in words is "one hundred seventy-two million, three hundred eighty-seven thousand, two hundred seventy-two".