91104280 has 16 divisors (see below), whose sum is σ = 204984720. Its totient is φ = 36441696.

The previous prime is 91104263. The next prime is 91104281. The reversal of 91104280 is 8240119.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91104281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1138764 + ... + 1138843.

It is an arithmetic number, because the mean of its divisors is an integer number (12811545).

Almost surely, 2^91104280 is an apocalyptic number.

It is an amenable number.

91104280 is an abundant number, since it is smaller than the sum of its proper divisors (113880440).

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

91104280 is a wasteful number, since it uses less digits than its factorization.

91104280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277618 (or 2277614 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 91104280 is about 9544.8562063553. The cubic root of 91104280 is about 449.9658904187.

Adding to 91104280 its reverse (8240119), we get a palindrome (99344399).

The spelling of 91104280 in words is "ninety-one million, one hundred four thousand, two hundred eighty".