2806887 has 16 divisors (see below), whose sum is σ = 4050432. Its totient is φ = 1722240.

The previous prime is 2806861. The next prime is 2806907. The reversal of 2806887 is 7886082.

It is not a de Polignac number, because 2806887 - 2¹¹ = 2804839 is a prime.

It is a super-2 number, since 2×2806887² = 15757229261538, which contains 22 as substring.

It is an Ulam number.

2806887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1812 + ... + 2982.

It is an arithmetic number, because the mean of its divisors is an integer number (253152).

2^2806887 is an apocalyptic number.

2806887 is a deficient number, since it is larger than the sum of its proper divisors (1243545).

2806887 is a wasteful number, since it uses less digits than its factorization.

2806887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 2806887 is about 1675.3766740647. The cubic root of 2806887 is about 141.0614389459.

The spelling of 2806887 in words is "two million, eight hundred six thousand, eight hundred eighty-seven".