8820009 has 40 divisors (see below), whose sum is σ = 15158880. Its totient is φ = 5054400.

The previous prime is 8820001. The next prime is 8820013. The reversal of 8820009 is 9000288.

It is not a de Polignac number, because 8820009 - 2³ = 8820001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8820001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16669 + ... + 17189.

It is an arithmetic number, because the mean of its divisors is an integer number (378972).

Almost surely, 2^8820009 is an apocalyptic number.

It is an amenable number.

8820009 is a deficient number, since it is larger than the sum of its proper divisors (6338871).

8820009 is a wasteful number, since it uses less digits than its factorization.

8820009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8820009 is about 2969.8499962119. The cubic root of 8820009 is about 206.6123811056.

The spelling of 8820009 in words is "eight million, eight hundred twenty thousand, nine".