8106440 has 16 divisors (see below), whose sum is σ = 18239580. Its totient is φ = 3242560.

The previous prime is 8106421. The next prime is 8106443. The reversal of 8106440 is 446018.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8099716 + 6724 = 2846^2 + 82^2 .

It is not an unprimeable number, because it can be changed into a prime (8106443) 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 3 ways as a sum of consecutive naturals, for example, 101291 + ... + 101370.

Almost surely, 2^8106440 is an apocalyptic number.

It is an amenable number.

8106440 is an abundant number, since it is smaller than the sum of its proper divisors (10133140).

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

8106440 is a wasteful number, since it uses less digits than its factorization.

8106440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202672 (or 202668 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 8106440 is about 2847.1810620331. The cubic root of 8106440 is about 200.8830949772.

The spelling of 8106440 in words is "eight million, one hundred six thousand, four hundred forty".