91184412 has 48 divisors (see below), whose sum is σ = 232952832. Its totient is φ = 27530880.

The previous prime is 91184411. The next prime is 91184459. The reversal of 91184412 is 21448119.

It is a self number, because there is not a number n which added to its sum of digits gives 91184412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91184411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40213 + ... + 42419.

It is an arithmetic number, because the mean of its divisors is an integer number (4853184).

Almost surely, 2^91184412 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 91184412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116476416).

91184412 is an abundant number, since it is smaller than the sum of its proper divisors (141768420).

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

91184412 is a wasteful number, since it uses less digits than its factorization.

91184412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2536 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 91184412 is about 9549.0529373336. The cubic root of 91184412 is about 450.0977762844.

It can be divided in two parts, 9118 and 4412, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 91184412 in words is "ninety-one million, one hundred eighty-four thousand, four hundred twelve".