727120172 has 18 divisors (see below), whose sum is σ = 1288024668. Its totient is φ = 359166232.

The previous prime is 727120169. The next prime is 727120193. The reversal of 727120172 is 271021727.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14363 + ... + 40749.

It is an arithmetic number, because the mean of its divisors is an integer number (71556926).

Almost surely, 2^727120172 is an apocalyptic number.

It is an amenable number.

727120172 is a deficient number, since it is larger than the sum of its proper divisors (560904496).

727120172 is a wasteful number, since it uses less digits than its factorization.

727120172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26557 (or 26472 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 727120172 is about 26965.1658997307. The cubic root of 727120172 is about 899.2257423382.

Adding to 727120172 its reverse (271021727), we get a palindrome (998141899).

The spelling of 727120172 in words is "seven hundred twenty-seven million, one hundred twenty thousand, one hundred seventy-two".