2787816 has 16 divisors (see below), whose sum is σ = 6969600. Its totient is φ = 929264.

The previous prime is 2787781. The next prime is 2787859. The reversal of 2787816 is 6187872.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58056 + ... + 58103.

It is an arithmetic number, because the mean of its divisors is an integer number (435600).

2^2787816 is an apocalyptic number.

It is an amenable number.

2787816 is an abundant number, since it is smaller than the sum of its proper divisors (4181784).

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

2787816 is a wasteful number, since it uses less digits than its factorization.

2787816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116168 (or 116164 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 2787816 is about 1669.6754175588. The cubic root of 2787816 is about 140.7412386084.

The spelling of 2787816 in words is "two million, seven hundred eighty-seven thousand, eight hundred sixteen".