3889845812 has 12 divisors (see below), whose sum is σ = 6807691716. Its totient is φ = 1944791040.

The previous prime is 3889845809. The next prime is 3889845821. The reversal of 3889845812 is 2185489883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1390245796 + 2499600016 = 37286^2 + 49996^2 .

It is a super-2 number, since 2×3889845812² = 30261800882267878688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67262 + ... + 110922.

It is an arithmetic number, because the mean of its divisors is an integer number (567307643).

Almost surely, 2^3889845812 is an apocalyptic number.

It is an amenable number.

3889845812 is a deficient number, since it is larger than the sum of its proper divisors (2917845904).

3889845812 is a wasteful number, since it uses less digits than its factorization.

3889845812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65938 (or 65936 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 56.

The square root of 3889845812 is about 62368.6284280807. The cubic root of 3889845812 is about 1572.6936343960.

The spelling of 3889845812 in words is "three billion, eight hundred eighty-nine million, eight hundred forty-five thousand, eight hundred twelve".