91228662 has 48 divisors (see below), whose sum is σ = 227665152. Its totient is φ = 25861680.

The previous prime is 91228639. The next prime is 91228759. The reversal of 91228662 is 26682219.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13743 + ... + 19269.

It is an arithmetic number, because the mean of its divisors is an integer number (4743024).

Almost surely, 2^91228662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91228662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113832576).

91228662 is an abundant number, since it is smaller than the sum of its proper divisors (136436490).

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

91228662 is a wasteful number, since it uses less digits than its factorization.

91228662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673 (or 5670 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 91228662 is about 9551.3696400045. The cubic root of 91228662 is about 450.1705723735.

The spelling of 91228662 in words is "ninety-one million, two hundred twenty-eight thousand, six hundred sixty-two".