809738690 has 16 divisors (see below), whose sum is σ = 1520900928. Its totient is φ = 309812976.

The previous prime is 809738687. The next prime is 809738749. The reversal of 809738690 is 96837908.

It is a super-2 number, since 2×809738690² = 1311353492165832200, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1760072 + ... + 1760531.

It is an arithmetic number, because the mean of its divisors is an integer number (95056308).

Almost surely, 2^809738690 is an apocalyptic number.

809738690 is a deficient number, since it is larger than the sum of its proper divisors (711162238).

809738690 is a wasteful number, since it uses less digits than its factorization.

809738690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520633.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 809738690 is about 28455.9078224540. The cubic root of 809738690 is about 932.0695001497.

The spelling of 809738690 in words is "eight hundred nine million, seven hundred thirty-eight thousand, six hundred ninety".