3843987 has 8 divisors (see below), whose sum is σ = 5857536. Its totient is φ = 2196552.

The previous prime is 3843977. The next prime is 3844019. The reversal of 3843987 is 7893483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3843987 - 2⁴ = 3843971 is a prime.

3843987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3843937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91503 + ... + 91544.

It is an arithmetic number, because the mean of its divisors is an integer number (732192).

Almost surely, 2^3843987 is an apocalyptic number.

3843987 is a deficient number, since it is larger than the sum of its proper divisors (2013549).

3843987 is a wasteful number, since it uses less digits than its factorization.

3843987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183057.

The product of its digits is 145152, while the sum is 42.

The square root of 3843987 is about 1960.6088340105. The cubic root of 3843987 is about 156.6488833494.

It can be divided in two parts, 384 and 3987, that added together give a triangular number (4371 = T₉₃).

The spelling of 3843987 in words is "three million, eight hundred forty-three thousand, nine hundred eighty-seven".