8215090 has 24 divisors (see below), whose sum is σ = 16015428. Its totient is φ = 3032640.

The previous prime is 8215079. The next prime is 8215099. The reversal of 8215090 is 905128.

It can be written as a sum of positive squares in 6 ways, for example, as 2411809 + 5803281 = 1553^2 + 2409^2 .

It is not an unprimeable number, because it can be changed into a prime (8215099) 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 11 ways as a sum of consecutive naturals, for example, 741 + ... + 4120.

Almost surely, 2^8215090 is an apocalyptic number.

8215090 is a deficient number, since it is larger than the sum of its proper divisors (7800338).

8215090 is a wasteful number, since it uses less digits than its factorization.

8215090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894 (or 4881 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 8215090 is about 2866.1978298785. The cubic root of 8215090 is about 201.7765886031.

The spelling of 8215090 in words is "eight million, two hundred fifteen thousand, ninety".