91320464 has 40 divisors (see below), whose sum is σ = 190175328. Its totient is φ = 42324480.

The previous prime is 91320371. The next prime is 91320469. The reversal of 91320464 is 46402319.

It is not an unprimeable number, because it can be changed into a prime (91320469) 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 7 ways as a sum of consecutive naturals, for example, 15719 + ... + 20729.

Almost surely, 2^91320464 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 91320464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95087664).

91320464 is an abundant number, since it is smaller than the sum of its proper divisors (98854864).

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

91320464 is a wasteful number, since it uses less digits than its factorization.

91320464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103 (or 5097 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 91320464 is about 9556.1741298492. The cubic root of 91320464 is about 450.3215216608.

The spelling of 91320464 in words is "ninety-one million, three hundred twenty thousand, four hundred sixty-four".