91243404 has 72 divisors (see below), whose sum is σ = 265760768. Its totient is φ = 25855200.

The previous prime is 91243393. The next prime is 91243417. The reversal of 91243404 is 40434219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30579 + ... + 33429.

Almost surely, 2^91243404 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 91243404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132880384).

91243404 is an abundant number, since it is smaller than the sum of its proper divisors (174517364).

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

91243404 is a wasteful number, since it uses less digits than its factorization.

91243404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 91243404 is about 9552.1413306127. The cubic root of 91243404 is about 450.1948193480.

The spelling of 91243404 in words is "ninety-one million, two hundred forty-three thousand, four hundred four".