2865886 has 4 divisors (see below), whose sum is σ = 4298832. Its totient is φ = 1432942.

The previous prime is 2865881. The next prime is 2865899. The reversal of 2865886 is 6885682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6885682 = 2 ⋅3442841.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 716470 + ... + 716473.

It is an arithmetic number, because the mean of its divisors is an integer number (1074708).

2^2865886 is an apocalyptic number.

2865886 is a deficient number, since it is larger than the sum of its proper divisors (1432946).

2865886 is a wasteful number, since it uses less digits than its factorization.

2865886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432945.

The product of its digits is 184320, while the sum is 43.

The square root of 2865886 is about 1692.8927904625. The cubic root of 2865886 is about 142.0429348448.

The spelling of 2865886 in words is "two million, eight hundred sixty-five thousand, eight hundred eighty-six".