172730508 has 24 divisors (see below), whose sum is σ = 404953920. Its totient is φ = 57303120.

The previous prime is 172730507. The next prime is 172730513. The reversal of 172730508 is 805037271.

It is not an unprimeable number, because it can be changed into a prime (172730507) 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, 31578 + ... + 36641.

It is an arithmetic number, because the mean of its divisors is an integer number (16873080).

Almost surely, 2^172730508 is an apocalyptic number.

It is an amenable number.

172730508 is an abundant number, since it is smaller than the sum of its proper divisors (232223412).

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

172730508 is a wasteful number, since it uses less digits than its factorization.

172730508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68437 (or 68435 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 172730508 is about 13142.6978965508. The cubic root of 172730508 is about 556.9159849087.

Adding to 172730508 its reverse (805037271), we get a palindrome (977767779).

The spelling of 172730508 in words is "one hundred seventy-two million, seven hundred thirty thousand, five hundred eight".