2721868 has 24 divisors (see below), whose sum is σ = 4998672. Its totient is φ = 1295424.

The previous prime is 2721863. The next prime is 2721869. The reversal of 2721868 is 8681272.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7671 + ... + 8017.

It is an arithmetic number, because the mean of its divisors is an integer number (208278).

2^2721868 is an apocalyptic number.

It is an amenable number.

2721868 is a deficient number, since it is larger than the sum of its proper divisors (2276804).

2721868 is a wasteful number, since it uses less digits than its factorization.

2721868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 439 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 2721868 is about 1649.8084737326. The cubic root of 2721868 is about 139.6225889342.

The spelling of 2721868 in words is "two million, seven hundred twenty-one thousand, eight hundred sixty-eight".