2781284 has 12 divisors (see below), whose sum is σ = 5309808. Its totient is φ = 1264200.

The previous prime is 2781271. The next prime is 2781293. The reversal of 2781284 is 4821872.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2781284.

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, 31562 + ... + 31649.

It is an arithmetic number, because the mean of its divisors is an integer number (442484).

2^2781284 is an apocalyptic number.

It is an amenable number.

2781284 is a deficient number, since it is larger than the sum of its proper divisors (2528524).

2781284 is a wasteful number, since it uses less digits than its factorization.

2781284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63226 (or 63224 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 2781284 is about 1667.7182016156. The cubic root of 2781284 is about 140.6312312630.

The spelling of 2781284 in words is "two million, seven hundred eighty-one thousand, two hundred eighty-four".