2721288 has 32 divisors (see below), whose sum is σ = 6903360. Its totient is φ = 893760.

The previous prime is 2721259. The next prime is 2721307. The reversal of 2721288 is 8821272.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906 + ... + 2502.

It is an arithmetic number, because the mean of its divisors is an integer number (215730).

2^2721288 is an apocalyptic number.

It is an amenable number.

2721288 is an abundant number, since it is smaller than the sum of its proper divisors (4182072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2721288 is a wasteful number, since it uses less digits than its factorization.

2721288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1673 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 2721288 is about 1649.6326863881. The cubic root of 2721288 is about 139.6126708860.

The spelling of 2721288 in words is "two million, seven hundred twenty-one thousand, two hundred eighty-eight".