91158272 has 36 divisors (see below), whose sum is σ = 183886416. Its totient is φ = 45096960.

The previous prime is 91158253. The next prime is 91158283. The reversal of 91158272 is 27285119.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22997 + ... + 26667.

It is an arithmetic number, because the mean of its divisors is an integer number (5107956).

Almost surely, 2^91158272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91158272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91943208).

91158272 is an abundant number, since it is smaller than the sum of its proper divisors (92728144).

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

91158272 is an equidigital number, since it uses as much as digits as its factorization.

91158272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3770 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 91158272 is about 9547.6841171040. The cubic root of 91158272 is about 450.0547620598.

The spelling of 91158272 in words is "ninety-one million, one hundred fifty-eight thousand, two hundred seventy-two".