3640436808 has 32 divisors (see below), whose sum is σ = 9347069760. Its totient is φ = 1180681920.

The previous prime is 3640436801. The next prime is 3640436819. The reversal of 3640436808 is 8086340463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640436808.

It is not an unprimeable number, because it can be changed into a prime (3640436801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048908 + ... + 2050683.

It is an arithmetic number, because the mean of its divisors is an integer number (292095930).

Almost surely, 2^3640436808 is an apocalyptic number.

It is an amenable number.

3640436808 is an abundant number, since it is smaller than the sum of its proper divisors (5706632952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640436808 is a wasteful number, since it uses less digits than its factorization.

3640436808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099637 (or 4099633 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 3640436808 is about 60336.0324184479. The cubic root of 3640436808 is about 1538.3358658355.

The spelling of 3640436808 in words is "three billion, six hundred forty million, four hundred thirty-six thousand, eight hundred eight".