2781888 has 28 divisors (see below), whose sum is σ = 7360920. Its totient is φ = 927232.

The previous prime is 2781887. The next prime is 2781901. The reversal of 2781888 is 8881872.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2781887) 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, 7053 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (262890).

2^2781888 is an apocalyptic number.

It is an amenable number.

2781888 is an abundant number, since it is smaller than the sum of its proper divisors (4579032).

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

2781888 is a wasteful number, since it uses less digits than its factorization.

2781888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14504 (or 14494 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The square root of 2781888 is about 1667.8992775345. The cubic root of 2781888 is about 140.6414106281.

The spelling of 2781888 in words is "two million, seven hundred eighty-one thousand, eight hundred eighty-eight".