2881816 has 16 divisors (see below), whose sum is σ = 6175440. Its totient is φ = 1235040.

The previous prime is 2881799. The next prime is 2881859. The reversal of 2881816 is 6181882.

It is a congruent number.

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, 25675 + ... + 25786.

It is an arithmetic number, because the mean of its divisors is an integer number (385965).

2^2881816 is an apocalyptic number.

It is an amenable number.

2881816 is an abundant number, since it is smaller than the sum of its proper divisors (3293624).

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

2881816 is a wasteful number, since it uses less digits than its factorization.

2881816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51474 (or 51470 counting only the distinct ones).

The product of its digits is 6144, while the sum is 34.

The square root of 2881816 is about 1697.5912346616. The cubic root of 2881816 is about 142.3056301475.

The spelling of 2881816 in words is "two million, eight hundred eighty-one thousand, eight hundred sixteen".