2780224 has 14 divisors (see below), whose sum is σ = 5517134. Its totient is φ = 1390080.

The previous prime is 2780209. The next prime is 2780233. The reversal of 2780224 is 4220872.

It can be written as a sum of positive squares in only one way, i.e., 2190400 + 589824 = 1480^2 + 768^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21657 + ... + 21784.

It is an arithmetic number, because the mean of its divisors is an integer number (394081).

2^2780224 is an apocalyptic number.

It is an amenable number.

2780224 is a deficient number, since it is larger than the sum of its proper divisors (2736910).

2780224 is an equidigital number, since it uses as much as digits as its factorization.

2780224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43453 (or 43443 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2780224 is about 1667.4003718364. The cubic root of 2780224 is about 140.6133632511.

The spelling of 2780224 in words is "two million, seven hundred eighty thousand, two hundred twenty-four".