3849991887 has 48 divisors (see below), whose sum is σ = 6457397760. Its totient is φ = 2026467072.

The previous prime is 3849991883. The next prime is 3849991891. The reversal of 3849991887 is 7881999483.

It is an interprime number because it is at equal distance from previous prime (3849991883) and next prime (3849991891).

It is not a de Polignac number, because 3849991887 - 2² = 3849991883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3849991883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101064 + ... + 133842.

It is an arithmetic number, because the mean of its divisors is an integer number (134529120).

Almost surely, 2^3849991887 is an apocalyptic number.

3849991887 is a deficient number, since it is larger than the sum of its proper divisors (2607405873).

3849991887 is a wasteful number, since it uses less digits than its factorization.

3849991887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860 (or 32853 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 66.

The square root of 3849991887 is about 62048.3028535028. The cubic root of 3849991887 is about 1567.3041063267.

The spelling of 3849991887 in words is "three billion, eight hundred forty-nine million, nine hundred ninety-one thousand, eight hundred eighty-seven".