8205906 has 16 divisors (see below), whose sum is σ = 16443648. Its totient is φ = 2730000.

The previous prime is 8205893. The next prime is 8205913. The reversal of 8205906 is 6095028.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3231 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (1027728).

Almost surely, 2^8205906 is an apocalyptic number.

8205906 is an abundant number, since it is smaller than the sum of its proper divisors (8237742).

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

8205906 is a wasteful number, since it uses less digits than its factorization.

8205906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 8205906 is about 2864.5952593691. The cubic root of 8205906 is about 201.7013690101.

The spelling of 8205906 in words is "eight million, two hundred five thousand, nine hundred six".