2687856 has 20 divisors (see below), whose sum is σ = 6943752. Its totient is φ = 895936.

The previous prime is 2687851. The next prime is 2687857. The reversal of 2687856 is 6587862.

2687856 is nontrivially palindromic in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27951 + ... + 28046.

2^2687856 is an apocalyptic number.

It is an amenable number.

2687856 is an abundant number, since it is smaller than the sum of its proper divisors (4255896).

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

2687856 is a wasteful number, since it uses less digits than its factorization.

2687856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56008 (or 56002 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 2687856 is about 1639.4682064621. The cubic root of 2687856 is about 139.0385828749.

The spelling of 2687856 in words is "two million, six hundred eighty-seven thousand, eight hundred fifty-six".