806510090 has 32 divisors (see below), whose sum is σ = 1578669264. Its totient is φ = 295418880.

The previous prime is 806510077. The next prime is 806510093. The reversal of 806510090 is 90015608.

It can be written as a sum of positive squares in 8 ways, for example, as 629859409 + 176650681 = 25097^2 + 13291^2 .

It is not an unprimeable number, because it can be changed into a prime (806510093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57821 + ... + 70400.

Almost surely, 2^806510090 is an apocalyptic number.

806510090 is a deficient number, since it is larger than the sum of its proper divisors (772159174).

806510090 is a wasteful number, since it uses less digits than its factorization.

806510090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128282.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 806510090 is about 28399.1212892230. The cubic root of 806510090 is about 930.8290637580.

Adding to 806510090 its reverse (90015608), we get a palindrome (896525698).

The spelling of 806510090 in words is "eight hundred six million, five hundred ten thousand, ninety".