808817990 has 16 divisors (see below), whose sum is σ = 1459196640. Its totient is φ = 322788480.

The previous prime is 808817981. The next prime is 808818007. The reversal of 808817990 is 99718808.

It is a happy number.

It is a congruent 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, 87731 + ... + 96510.

It is an arithmetic number, because the mean of its divisors is an integer number (91199790).

Almost surely, 2^808817990 is an apocalyptic number.

808817990 is a deficient number, since it is larger than the sum of its proper divisors (650378650).

808817990 is a wasteful number, since it uses less digits than its factorization.

808817990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184687.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 808817990 is about 28439.7255612638. The cubic root of 808817990 is about 931.7161014316.

The spelling of 808817990 in words is "eight hundred eight million, eight hundred seventeen thousand, nine hundred ninety".