3811999986 has 24 divisors (see below), whose sum is σ = 8307081900. Its totient is φ = 1263320736.

The previous prime is 3811999979. The next prime is 3811999991. The reversal of 3811999986 is 6899991183.

3811999986 is a `hidden beast` number, since 381 + 1 + 99 + 99 + 86 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3769346025 + 42653961 = 61395^2 + 6531^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608961 + ... + 615188.

Almost surely, 2^3811999986 is an apocalyptic number.

3811999986 is an abundant number, since it is smaller than the sum of its proper divisors (4495081914).

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

3811999986 is a wasteful number, since it uses less digits than its factorization.

3811999986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224330 (or 1224327 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 3811999986 is about 61741.3960483564. The cubic root of 3811999986 is about 1562.1316445898.

The spelling of 3811999986 in words is "three billion, eight hundred eleven million, nine hundred ninety-nine thousand, nine hundred eighty-six".