91740580 has 12 divisors (see below), whose sum is σ = 192655260. Its totient is φ = 36696224.

The previous prime is 91740557. The next prime is 91740581. The reversal of 91740580 is 8504719.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31181056 + 60559524 = 5584^2 + 7782^2 .

It is not an unprimeable number, because it can be changed into a prime (91740581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293495 + ... + 2293534.

It is an arithmetic number, because the mean of its divisors is an integer number (16054605).

Almost surely, 2^91740580 is an apocalyptic number.

It is an amenable number.

91740580 is an abundant number, since it is smaller than the sum of its proper divisors (100914680).

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

91740580 is a wasteful number, since it uses less digits than its factorization.

91740580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587038 (or 4587036 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 91740580 is about 9578.1302977147. The cubic root of 91740580 is about 451.0110272081.

The spelling of 91740580 in words is "ninety-one million, seven hundred forty thousand, five hundred eighty".