2721238 has 24 divisors (see below), whose sum is σ = 4519368. Its totient is φ = 1228032.

The previous prime is 2721227. The next prime is 2721247. The reversal of 2721238 is 8321272.

2721238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28006 + ... + 28102.

It is an arithmetic number, because the mean of its divisors is an integer number (188307).

2^2721238 is an apocalyptic number.

2721238 is a deficient number, since it is larger than the sum of its proper divisors (1798130).

2721238 is a wasteful number, since it uses less digits than its factorization.

2721238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 195 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 2721238 is about 1649.6175314296. The cubic root of 2721238 is about 139.6118158158.

The spelling of 2721238 in words is "two million, seven hundred twenty-one thousand, two hundred thirty-eight".