2780228 has 24 divisors (see below), whose sum is σ = 5352480. Its totient is φ = 1253120.

The previous prime is 2780209. The next prime is 2780233. The reversal of 2780228 is 8220872.

2780228 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2780228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7700 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (223020).

2^2780228 is an apocalyptic number.

It is an amenable number.

2780228 is a deficient number, since it is larger than the sum of its proper divisors (2572252).

2780228 is a wasteful number, since it uses less digits than its factorization.

2780228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 2780228 is about 1667.4015713079. The cubic root of 2780228 is about 140.6134306861.

The spelling of 2780228 in words is "two million, seven hundred eighty thousand, two hundred twenty-eight".