2781224 has 16 divisors (see below), whose sum is σ = 5244000. Its totient is φ = 1382832.

The previous prime is 2781221. The next prime is 2781271. The reversal of 2781224 is 4221872.

It is a junction number, because it is equal to n+sod(n) for n = 2781193 and 2781202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781221) 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, 719 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (327750).

2^2781224 is an apocalyptic number.

It is an amenable number.

2781224 is a deficient number, since it is larger than the sum of its proper divisors (2462776).

2781224 is a wasteful number, since it uses less digits than its factorization.

2781224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952 (or 1948 counting only the distinct ones).

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

The square root of 2781224 is about 1667.7002128680. The cubic root of 2781224 is about 140.6302199873.

The spelling of 2781224 in words is "two million, seven hundred eighty-one thousand, two hundred twenty-four".