8115990 has 32 divisors (see below), whose sum is σ = 19686240. Its totient is φ = 2141184.

The previous prime is 8115977. The next prime is 8115997. The reversal of 8115990 is 995118.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8115997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 4304.

It is an arithmetic number, because the mean of its divisors is an integer number (615195).

Almost surely, 2^8115990 is an apocalyptic number.

8115990 is an abundant number, since it is smaller than the sum of its proper divisors (11570250).

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

8115990 is a wasteful number, since it uses less digits than its factorization.

8115990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 8115990 is about 2848.8576658022. The cubic root of 8115990 is about 200.9619491844.

The spelling of 8115990 in words is "eight million, one hundred fifteen thousand, nine hundred ninety".