91319424 has 128 divisors (see below), whose sum is σ = 282890880. Its totient is φ = 25559040.

The previous prime is 91319413. The next prime is 91319467. The reversal of 91319424 is 42491319.

It is a tau number, because it is divible by the number of its divisors (128).

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, 142144 + ... + 142784.

It is an arithmetic number, because the mean of its divisors is an integer number (2210085).

Almost surely, 2^91319424 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 91319424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141445440).

91319424 is an abundant number, since it is smaller than the sum of its proper divisors (191571456).

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

91319424 is a wasteful number, since it uses less digits than its factorization.

91319424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 706 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 91319424 is about 9556.1197146122. The cubic root of 91319424 is about 450.3198121638.

The spelling of 91319424 in words is "ninety-one million, three hundred nineteen thousand, four hundred twenty-four".