8091540 has 36 divisors (see below), whose sum is σ = 24544884. Its totient is φ = 2157696.

The previous prime is 8091533. The next prime is 8091547. The reversal of 8091540 is 451908.

8091540 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8091533) and next prime (8091547).

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 1710864 = 2526^2 + 1308^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22297 + ... + 22656.

Almost surely, 2^8091540 is an apocalyptic number.

It is an amenable number.

8091540 is an abundant number, since it is smaller than the sum of its proper divisors (16453344).

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

8091540 is a wasteful number, since it uses less digits than its factorization.

8091540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44968 (or 44963 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 8091540 is about 2844.5632353667. The cubic root of 8091540 is about 200.7599421159.

The spelling of 8091540 in words is "eight million, ninety-one thousand, five hundred forty".