91728272 has 20 divisors (see below), whose sum is σ = 178905216. Its totient is φ = 45559200.

The previous prime is 91728271. The next prime is 91728289. The reversal of 91728272 is 27282719.

It is not an unprimeable number, because it can be changed into a prime (91728271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16568 + ... + 21399.

Almost surely, 2^91728272 is an apocalyptic number.

It is an amenable number.

91728272 is a deficient number, since it is larger than the sum of its proper divisors (87176944).

91728272 is a wasteful number, since it uses less digits than its factorization.

91728272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38126 (or 38120 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 91728272 is about 9577.4877708092. The cubic root of 91728272 is about 450.9908569556.

The spelling of 91728272 in words is "ninety-one million, seven hundred twenty-eight thousand, two hundred seventy-two".