91104240 has 80 divisors (see below), whose sum is σ = 297302400. Its totient is φ = 23014656.

The previous prime is 91104239. The next prime is 91104253. The reversal of 91104240 is 4240119.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 5430 + ... + 14549.

It is an arithmetic number, because the mean of its divisors is an integer number (3716280).

Almost surely, 2^91104240 is an apocalyptic number.

It is an amenable number.

91104240 is an abundant number, since it is smaller than the sum of its proper divisors (206198160).

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

91104240 is a wasteful number, since it uses less digits than its factorization.

91104240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20014 (or 20008 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 91104240 is about 9544.8541109857. The cubic root of 91104240 is about 449.9658245651.

Adding to 91104240 its reverse (4240119), we get a palindrome (95344359).

The spelling of 91104240 in words is "ninety-one million, one hundred four thousand, two hundred forty".