91307040 has 96 divisors (see below), whose sum is σ = 313782336. Its totient is φ = 22133760.

The previous prime is 91307003. The next prime is 91307053. The reversal of 91307040 is 4070319.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 91307040.

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 15 ways as a sum of consecutive naturals, for example, 3367 + ... + 13926.

It is an arithmetic number, because the mean of its divisors is an integer number (3268566).

Almost surely, 2^91307040 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 91307040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156891168).

91307040 is an abundant number, since it is smaller than the sum of its proper divisors (222475296).

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

91307040 is a wasteful number, since it uses less digits than its factorization.

91307040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17322 (or 17314 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 91307040 is about 9555.4717308985. The cubic root of 91307040 is about 450.2994550028.

Adding to 91307040 its reverse (4070319), we get a palindrome (95377359).

The spelling of 91307040 in words is "ninety-one million, three hundred seven thousand, forty".