1008796809 has 32 divisors (see below), whose sum is σ = 1392652800. Its totient is φ = 649284480.

The previous prime is 1008796801. The next prime is 1008796819. The reversal of 1008796809 is 9086978001.

It is a happy number.

It is not a de Polignac number, because 1008796809 - 2³ = 1008796801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1008796801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3222837 + ... + 3223149.

It is an arithmetic number, because the mean of its divisors is an integer number (43520400).

Almost surely, 2^1008796809 is an apocalyptic number.

It is an amenable number.

1008796809 is a deficient number, since it is larger than the sum of its proper divisors (383855991).

1008796809 is a wasteful number, since it uses less digits than its factorization.

1008796809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 1008796809 is about 31761.5618161324. The cubic root of 1008796809 is about 1002.9237132368.

The spelling of 1008796809 in words is "one billion, eight million, seven hundred ninety-six thousand, eight hundred nine".