2781916 has 12 divisors (see below), whose sum is σ = 4906440. Its totient is φ = 1380080.

The previous prime is 2781913. The next prime is 2781929. The reversal of 2781916 is 6191872.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781913) 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, 2131 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (408870).

2^2781916 is an apocalyptic number.

It is an amenable number.

2781916 is a deficient number, since it is larger than the sum of its proper divisors (2124524).

2781916 is a wasteful number, since it uses less digits than its factorization.

2781916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444 (or 5442 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 2781916 is about 1667.9076713056. The cubic root of 2781916 is about 140.6418824834.

The spelling of 2781916 in words is "two million, seven hundred eighty-one thousand, nine hundred sixteen".