91094220 has 240 divisors, whose sum is σ = 339071040. Its totient is φ = 20030976.

The previous prime is 91094183. The next prime is 91094231. The reversal of 91094220 is 2249019.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 328722 + ... + 328998.

It is an arithmetic number, because the mean of its divisors is an integer number (1412796).

Almost surely, 2^91094220 is an apocalyptic number.

91094220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91094220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169535520).

91094220 is an abundant number, since it is smaller than the sum of its proper divisors (247976820).

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

91094220 is a wasteful number, since it uses less digits than its factorization.

91094220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 91094220 is about 9544.3292063927. The cubic root of 91094220 is about 449.9493276276.

The spelling of 91094220 in words is "ninety-one million, ninety-four thousand, two hundred twenty".