2721988 has 12 divisors (see below), whose sum is σ = 4778172. Its totient is φ = 1356800.

The previous prime is 2721947. The next prime is 2722001. The reversal of 2721988 is 8891272.

It can be written as a sum of positive squares in 2 ways, for example, as 2663424 + 58564 = 1632^2 + 242^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756 + ... + 2452.

It is an arithmetic number, because the mean of its divisors is an integer number (398181).

2^2721988 is an apocalyptic number.

It is an amenable number.

2721988 is a deficient number, since it is larger than the sum of its proper divisors (2056184).

2721988 is a wasteful number, since it uses less digits than its factorization.

2721988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102 (or 2100 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 2721988 is about 1649.8448411896. The cubic root of 2721988 is about 139.6246407683.

The spelling of 2721988 in words is "two million, seven hundred twenty-one thousand, nine hundred eighty-eight".