3887786991 has 24 divisors (see below), whose sum is σ = 5945546880. Its totient is φ = 2253784720.

The previous prime is 3887786977. The next prime is 3887787017. The reversal of 3887786991 is 1996877883.

It is not a de Polignac number, because 3887786991 - 2⁷ = 3887786863 is a prime.

It is a super-2 number, since 2×3887786991² = 30229775374777668162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887786971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224481 + ... + 241178.

It is an arithmetic number, because the mean of its divisors is an integer number (247731120).

Almost surely, 2^3887786991 is an apocalyptic number.

3887786991 is a deficient number, since it is larger than the sum of its proper divisors (2057759889).

3887786991 is a wasteful number, since it uses less digits than its factorization.

3887786991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465707 (or 465696 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 66.

The square root of 3887786991 is about 62352.1209823692. The cubic root of 3887786991 is about 1572.4161198742.

The spelling of 3887786991 in words is "three billion, eight hundred eighty-seven million, seven hundred eighty-six thousand, nine hundred ninety-one".