3887691918 has 32 divisors (see below), whose sum is σ = 8774732160. Its totient is φ = 1137464160.

The previous prime is 3887691917. The next prime is 3887691923. The reversal of 3887691918 is 8191967883.

It is a super-2 number, since 2×3887691918² = 30228296898565037448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887691911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013680 + ... + 1017507.

It is an arithmetic number, because the mean of its divisors is an integer number (274210380).

Almost surely, 2^3887691918 is an apocalyptic number.

3887691918 is an abundant number, since it is smaller than the sum of its proper divisors (4887040242).

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

3887691918 is a wasteful number, since it uses less digits than its factorization.

3887691918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031232.

The product of its digits is 5225472, while the sum is 60.

The square root of 3887691918 is about 62351.3585898495. The cubic root of 3887691918 is about 1572.4033023393.

The spelling of 3887691918 in words is "three billion, eight hundred eighty-seven million, six hundred ninety-one thousand, nine hundred eighteen".