91093860 has 144 divisors (see below), whose sum is σ = 324717120. Its totient is φ = 20378880.

The previous prime is 91093859. The next prime is 91093867. The reversal of 91093860 is 6839019.

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

It is not an unprimeable number, because it can be changed into a prime (91093867) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 23971 + ... + 27509.

It is an arithmetic number, because the mean of its divisors is an integer number (2254980).

Almost surely, 2^91093860 is an apocalyptic number.

91093860 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 91093860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162358560).

91093860 is an abundant number, since it is smaller than the sum of its proper divisors (233623260).

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

91093860 is a wasteful number, since it uses less digits than its factorization.

91093860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578 (or 3573 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 91093860 is about 9544.3103470078. The cubic root of 91093860 is about 449.9487349007.

The spelling of 91093860 in words is "ninety-one million, ninety-three thousand, eight hundred sixty".