8115820 has 24 divisors (see below), whose sum is σ = 17441424. Its totient is φ = 3170496.

The previous prime is 8115799. The next prime is 8115829. The reversal of 8115820 is 285118.

It is not an unprimeable number, because it can be changed into a prime (8115829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3859 + ... + 5578.

It is an arithmetic number, because the mean of its divisors is an integer number (726726).

Almost surely, 2^8115820 is an apocalyptic number.

It is an amenable number.

8115820 is an abundant number, since it is smaller than the sum of its proper divisors (9325604).

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

8115820 is a wasteful number, since it uses less digits than its factorization.

8115820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489 (or 9487 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 8115820 is about 2848.8278291255. The cubic root of 8115820 is about 200.9605460378.

The spelling of 8115820 in words is "eight million, one hundred fifteen thousand, eight hundred twenty".