16809992 has 8 divisors (see below), whose sum is σ = 31518750. Its totient is φ = 8404992.

The previous prime is 16809979. The next prime is 16809997. The reversal of 16809992 is 29990861.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 5827396 = 3314^2 + 2414^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16809997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050617 + ... + 1050632.

Almost surely, 2^16809992 is an apocalyptic number.

It is an amenable number.

16809992 is a deficient number, since it is larger than the sum of its proper divisors (14708758).

16809992 is a wasteful number, since it uses less digits than its factorization.

16809992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101255 (or 2101251 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 16809992 is about 4099.9990243901. Note that the first 3 decimals coincide. The cubic root of 16809992 is about 256.1665989145.

The spelling of 16809992 in words is "sixteen million, eight hundred nine thousand, nine hundred ninety-two".