2781044 has 24 divisors (see below), whose sum is σ = 5678400. Its totient is φ = 1191288.

The previous prime is 2781029. The next prime is 2781059. The reversal of 2781044 is 4401872.

It is an interprime number because it is at equal distance from previous prime (2781029) and next prime (2781059).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (236600).

2^2781044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2781044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2839200).

2781044 is an abundant number, since it is smaller than the sum of its proper divisors (2897356).

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

2781044 is a wasteful number, since it uses less digits than its factorization.

2781044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 2781044 is about 1667.6462454609. The cubic root of 2781044 is about 140.6271860730.

The spelling of 2781044 in words is "two million, seven hundred eighty-one thousand, forty-four".