39809690848 has 24 divisors (see below), whose sum is σ = 79183328112. Its totient is φ = 19699639296.

The previous prime is 39809690819. The next prime is 39809690861. The reversal of 39809690848 is 84809690893.

It is a happy number.

It is a super-2 number, since 2×39809690848² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39809690848.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6409540 + ... + 6415747.

It is an arithmetic number, because the mean of its divisors is an integer number (3299305338).

Almost surely, 2^39809690848 is an apocalyptic number.

It is an amenable number.

39809690848 is a deficient number, since it is larger than the sum of its proper divisors (39373637264).

39809690848 is a wasteful number, since it uses less digits than its factorization.

39809690848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825394 (or 12825386 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 64.

The spelling of 39809690848 in words is "thirty-nine billion, eight hundred nine million, six hundred ninety thousand, eight hundred forty-eight".