3812921808 has 20 divisors (see below), whose sum is σ = 9850048128. Its totient is φ = 1270973920.

The previous prime is 3812921803. The next prime is 3812921809. The reversal of 3812921808 is 8081292183.

It is a self number, because there is not a number n which added to its sum of digits gives 3812921808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3812921803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39717888 + ... + 39717983.

Almost surely, 2^3812921808 is an apocalyptic number.

It is an amenable number.

3812921808 is an abundant number, since it is smaller than the sum of its proper divisors (6037126320).

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

3812921808 is a wasteful number, since it uses less digits than its factorization.

3812921808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79435882 (or 79435876 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 3812921808 is about 61748.8607830136. The cubic root of 3812921808 is about 1562.2575532347.

The spelling of 3812921808 in words is "three billion, eight hundred twelve million, nine hundred twenty-one thousand, eight hundred eight".