91382272 has 20 divisors (see below), whose sum is σ = 182587086. Its totient is φ = 45690880.

The previous prime is 91382257. The next prime is 91382273. The reversal of 91382272 is 27228319.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 13660416 = 8816^2 + 3696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91382273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88729 + ... + 89752.

Almost surely, 2^91382272 is an apocalyptic number.

It is an amenable number.

91382272 is a deficient number, since it is larger than the sum of its proper divisors (91204814).

91382272 is an equidigital number, since it uses as much as digits as its factorization.

91382272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178499 (or 178483 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 91382272 is about 9559.4075130209. The cubic root of 91382272 is about 450.4230950807.

The spelling of 91382272 in words is "ninety-one million, three hundred eighty-two thousand, two hundred seventy-two".