16809722 has 8 divisors (see below), whose sum is σ = 25242516. Its totient is φ = 8395552.

The previous prime is 16809679. The next prime is 16809739. The reversal of 16809722 is 22790861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 7921 = 4099^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2123 + ... + 6174.

Almost surely, 2^16809722 is an apocalyptic number.

16809722 is a deficient number, since it is larger than the sum of its proper divisors (8432794).

16809722 is a wasteful number, since it uses less digits than its factorization.

16809722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 16809722 is about 4099.9660974208. The cubic root of 16809722 is about 256.1652274018.

The spelling of 16809722 in words is "sixteen million, eight hundred nine thousand, seven hundred twenty-two".