10989809 has 16 divisors (see below), whose sum is σ = 11995200. Its totient is φ = 10036224.

The previous prime is 10989787. The next prime is 10989817. The reversal of 10989809 is 90898901.

10989809 = T₂ + T₃ + ... + T₄₀₃.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10989809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10989809.

It is not an unprimeable number, because it can be changed into a prime (10989859) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 113249 + ... + 113345.

It is an arithmetic number, because the mean of its divisors is an integer number (749700).

Almost surely, 2^10989809 is an apocalyptic number.

10989809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10989809 is a deficient number, since it is larger than the sum of its proper divisors (1005391).

10989809 is an equidigital number, since it uses as much as digits as its factorization.

10989809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 10989809 is about 3315.0880832943. The cubic root of 10989809 is about 222.3293072874.

The spelling of 10989809 in words is "ten million, nine hundred eighty-nine thousand, eight hundred nine".