91806822 has 48 divisors (see below), whose sum is σ = 210275520. Its totient is φ = 28868400.

The previous prime is 91806821. The next prime is 91806853. The reversal of 91806822 is 22860819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91806821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112797 + ... + 113607.

It is an arithmetic number, because the mean of its divisors is an integer number (4380740).

Almost surely, 2^91806822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91806822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105137760).

91806822 is an abundant number, since it is smaller than the sum of its proper divisors (118468698).

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

91806822 is a wasteful number, since it uses less digits than its factorization.

91806822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 91806822 is about 9581.5876554984. The cubic root of 91806822 is about 451.1195530994.

The spelling of 91806822 in words is "ninety-one million, eight hundred six thousand, eight hundred twenty-two".