91320468 has 12 divisors (see below), whose sum is σ = 213081120. Its totient is φ = 30440152.

The previous prime is 91320371. The next prime is 91320469. The reversal of 91320468 is 86402319.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91320469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3805008 + ... + 3805031.

It is an arithmetic number, because the mean of its divisors is an integer number (17756760).

Almost surely, 2^91320468 is an apocalyptic number.

It is an amenable number.

91320468 is an abundant number, since it is smaller than the sum of its proper divisors (121760652).

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

91320468 is a wasteful number, since it uses less digits than its factorization.

91320468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610046 (or 7610044 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 91320468 is about 9556.1743391380. The cubic root of 91320468 is about 450.3215282357.

The spelling of 91320468 in words is "ninety-one million, three hundred twenty thousand, four hundred sixty-eight".