3836638856 has 8 divisors (see below), whose sum is σ = 7193697870. Its totient is φ = 1918319424.

The previous prime is 3836638853. The next prime is 3836638873. The reversal of 3836638856 is 6588366383.

3836638856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3508666756 + 327972100 = 59234^2 + 18110^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3836638856² = 29439595422737977472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3836638853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239789921 + ... + 239789936.

Almost surely, 2^3836638856 is an apocalyptic number.

It is an amenable number.

3836638856 is a deficient number, since it is larger than the sum of its proper divisors (3357059014).

3836638856 is a wasteful number, since it uses less digits than its factorization.

3836638856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479579863 (or 479579859 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 56.

The square root of 3836638856 is about 61940.6074881414. The cubic root of 3836638856 is about 1565.4900330323.

The spelling of 3836638856 in words is "three billion, eight hundred thirty-six million, six hundred thirty-eight thousand, eight hundred fifty-six".