91096720 has 80 divisors (see below), whose sum is σ = 248859072. Its totient is φ = 30574080.

The previous prime is 91096673. The next prime is 91096741. The reversal of 91096720 is 2769019.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×91096720² = 16597224789516800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 7459 + ... + 15421.

Almost surely, 2^91096720 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 91096720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124429536).

91096720 is an abundant number, since it is smaller than the sum of its proper divisors (157762352).

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

91096720 is a wasteful number, since it uses less digits than its factorization.

91096720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000 (or 7994 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 91096720 is about 9544.4601733152. The cubic root of 91096720 is about 449.9534437432.

The spelling of 91096720 in words is "ninety-one million, ninety-six thousand, seven hundred twenty".