2855987 has 4 divisors (see below), whose sum is σ = 2874336. Its totient is φ = 2837640.

The previous prime is 2855953. The next prime is 2855989. The reversal of 2855987 is 7895582.

2855987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2855987 - 2⁸ = 2855731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2855989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8939 + ... + 9252.

It is an arithmetic number, because the mean of its divisors is an integer number (718584).

2^2855987 is an apocalyptic number.

2855987 is a deficient number, since it is larger than the sum of its proper divisors (18349).

2855987 is a wasteful number, since it uses less digits than its factorization.

2855987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18348.

The product of its digits is 201600, while the sum is 44.

The square root of 2855987 is about 1689.9665677167. The cubic root of 2855987 is about 141.8792036248.

The spelling of 2855987 in words is "two million, eight hundred fifty-five thousand, nine hundred eighty-seven".