3985981936 has 10 divisors (see below), whose sum is σ = 7722840032. Its totient is φ = 1992990960.

The previous prime is 3985981921. The next prime is 3985981943. The reversal of 3985981936 is 6391895893.

3985981936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124561920 + ... + 124561951.

Almost surely, 2^3985981936 is an apocalyptic number.

It is an amenable number.

3985981936 is a deficient number, since it is larger than the sum of its proper divisors (3736858096).

3985981936 is a wasteful number, since it uses less digits than its factorization.

3985981936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249123879 (or 249123873 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 61.

The square root of 3985981936 is about 63134.6334114644. The cubic root of 3985981936 is about 1585.5445240707.

The spelling of 3985981936 in words is "three billion, nine hundred eighty-five million, nine hundred eighty-one thousand, nine hundred thirty-six".