2721844 has 12 divisors (see below), whose sum is σ = 4783968. Its totient is φ = 1355000.

The previous prime is 2721841. The next prime is 2721863. The reversal of 2721844 is 4481272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721841) 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, 352 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (398664).

2^2721844 is an apocalyptic number.

It is an amenable number.

2721844 is a deficient number, since it is larger than the sum of its proper divisors (2062124).

2721844 is a wasteful number, since it uses less digits than its factorization.

2721844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966 (or 2964 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 2721844 is about 1649.8012001450. The cubic root of 2721844 is about 139.6221785601.

It can be divided in two parts, 272 and 1844, that added together give a square (2116 = 46²).

The spelling of 2721844 in words is "two million, seven hundred twenty-one thousand, eight hundred forty-four".