91366220 has 48 divisors (see below), whose sum is σ = 212889600. Its totient is φ = 32656320.

The previous prime is 91366199. The next prime is 91366241. The reversal of 91366220 is 2266319.

It is an interprime number because it is at equal distance from previous prime (91366199) and next prime (91366241).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9461 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (4435200).

Almost surely, 2^91366220 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 91366220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106444800).

91366220 is an abundant number, since it is smaller than the sum of its proper divisors (121523380).

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

91366220 is a wasteful number, since it uses less digits than its factorization.

91366220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118 (or 7116 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 91366220 is about 9558.5678843643. The cubic root of 91366220 is about 450.3967201075.

The spelling of 91366220 in words is "ninety-one million, three hundred sixty-six thousand, two hundred twenty".