91086912 has 336 divisors, whose sum is σ = 332841600. Its totient is φ = 23224320.

The previous prime is 91086907. The next prime is 91086937. The reversal of 91086912 is 21968019.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2221612 + ... + 2221652.

It is an arithmetic number, because the mean of its divisors is an integer number (990600).

Almost surely, 2^91086912 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 91086912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166420800).

91086912 is an abundant number, since it is smaller than the sum of its proper divisors (241754688).

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

91086912 is a wasteful number, since it uses less digits than its factorization.

91086912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 91086912 is about 9543.9463535793. The cubic root of 91086912 is about 449.9372949665.

The spelling of 91086912 in words is "ninety-one million, eighty-six thousand, nine hundred twelve".