2208642686 has 16 divisors (see below), whose sum is σ = 3514286736. Its totient is φ = 1037452416.

The previous prime is 2208642679. The next prime is 2208642713. The reversal of 2208642686 is 6862468022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40781 + ... + 77976.

It is an arithmetic number, because the mean of its divisors is an integer number (219642921).

Almost surely, 2^2208642686 is an apocalyptic number.

2208642686 is a deficient number, since it is larger than the sum of its proper divisors (1305644050).

2208642686 is a wasteful number, since it uses less digits than its factorization.

2208642686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119323.

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 2208642686 is about 46996.1986335065. The cubic root of 2208642686 is about 1302.2923432127.

The spelling of 2208642686 in words is "two billion, two hundred eight million, six hundred forty-two thousand, six hundred eighty-six".