2721740 has 24 divisors (see below), whose sum is σ = 6532512. Its totient is φ = 933120.

The previous prime is 2721727. The next prime is 2721767. The reversal of 2721740 is 471272.

2721740 = T₁₂₃ + T₁₂₄ + ... + T₂₆₂.

2721740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam 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 7 ways as a sum of consecutive naturals, for example, 9581 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (272188).

2^2721740 is an apocalyptic number.

2721740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2721740 is an abundant number, since it is smaller than the sum of its proper divisors (3810772).

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

2721740 is a wasteful number, since it uses less digits than its factorization.

2721740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19457 (or 19455 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 2721740 is about 1649.7696808949. The cubic root of 2721740 is about 139.6204002447.

The spelling of 2721740 in words is "two million, seven hundred twenty-one thousand, seven hundred forty".