91112080 has 20 divisors (see below), whose sum is σ = 211835772. Its totient is φ = 36444800.

The previous prime is 91112057. The next prime is 91112081. The reversal of 91112080 is 8021119.

It can be written as a sum of positive squares in 2 ways, for example, as 42614784 + 48497296 = 6528^2 + 6964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×91112080² = 16602822243852800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91112081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569371 + ... + 569530.

Almost surely, 2^91112080 is an apocalyptic number.

It is an amenable number.

91112080 is an abundant number, since it is smaller than the sum of its proper divisors (120723692).

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

91112080 is a wasteful number, since it uses less digits than its factorization.

91112080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138914 (or 1138908 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 91112080 is about 9545.2647946508. The cubic root of 91112080 is about 449.9787315051.

Adding to 91112080 its reverse (8021119), we get a palindrome (99133199).

The spelling of 91112080 in words is "ninety-one million, one hundred twelve thousand, eighty".