91622556 has 48 divisors (see below), whose sum is σ = 238536480. Its totient is φ = 30412800.

The previous prime is 91622543. The next prime is 91622561. The reversal of 91622556 is 65522619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 91622556.

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 15 ways as a sum of consecutive naturals, for example, 26106 + ... + 29406.

It is an arithmetic number, because the mean of its divisors is an integer number (4969510).

Almost surely, 2^91622556 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 91622556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119268240).

91622556 is an abundant number, since it is smaller than the sum of its proper divisors (146913924).

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

91622556 is a wasteful number, since it uses less digits than its factorization.

91622556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571 (or 3563 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 91622556 is about 9571.9671959321. The cubic root of 91622556 is about 450.8175360667.

The spelling of 91622556 in words is "ninety-one million, six hundred twenty-two thousand, five hundred fifty-six".