2721998 has 16 divisors (see below), whose sum is σ = 4289760. Its totient is φ = 1293600.

The previous prime is 2721947. The next prime is 2722001. The reversal of 2721998 is 8991272.

It is a super-2 number, since 2×2721998² = 14818546224008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3788 + ... + 4448.

It is an arithmetic number, because the mean of its divisors is an integer number (268110).

2^2721998 is an apocalyptic number.

2721998 is a deficient number, since it is larger than the sum of its proper divisors (1567762).

2721998 is a wasteful number, since it uses less digits than its factorization.

2721998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its digits is 18144, while the sum is 38.

The square root of 2721998 is about 1649.8478717748. The cubic root of 2721998 is about 139.6248117517.

The spelling of 2721998 in words is "two million, seven hundred twenty-one thousand, nine hundred ninety-eight".