3811009986 has 240 divisors, whose sum is σ = 10869230592. Its totient is φ = 990662400.

The previous prime is 3811009981. The next prime is 3811010023. The reversal of 3811009986 is 6899001183.

3811009986 is a `hidden beast` number, since 381 + 100 + 99 + 86 = 666.

3811009986 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3811009986² = 29047594226783440392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811009981) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4182871 + ... + 4183781.

Almost surely, 2^3811009986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3811009986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5434615296).

3811009986 is an abundant number, since it is smaller than the sum of its proper divisors (7058220606).

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

3811009986 is a wasteful number, since it uses less digits than its factorization.

3811009986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 3811009986 is about 61733.3782163264. The cubic root of 3811009986 is about 1561.9964011277.

The spelling of 3811009986 in words is "three billion, eight hundred eleven million, nine thousand, nine hundred eighty-six".