91055040 has 56 divisors (see below), whose sum is σ = 289102800. Its totient is φ = 24281088.

The previous prime is 91055033. The next prime is 91055047. The reversal of 91055040 is 4055019.

It is an interprime number because it is at equal distance from previous prime (91055033) and next prime (91055047).

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 91055040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91055047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46465 + ... + 48384.

It is an arithmetic number, because the mean of its divisors is an integer number (5162550).

Almost surely, 2^91055040 is an apocalyptic number.

It is an amenable number.

91055040 is an abundant number, since it is smaller than the sum of its proper divisors (198047760).

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

91055040 is a wasteful number, since it uses less digits than its factorization.

91055040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94869 (or 94859 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 91055040 is about 9542.2764579528. The cubic root of 91055040 is about 449.8848100226.

The spelling of 91055040 in words is "ninety-one million, fifty-five thousand, forty".