2720440 has 32 divisors (see below), whose sum is σ = 6389280. Its totient is φ = 1040512.

The previous prime is 2720411. The next prime is 2720441. The reversal of 2720440 is 440272.

2720440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720441) 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, 559 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (199665).

2^2720440 is an apocalyptic number.

2720440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2720440 is an abundant number, since it is smaller than the sum of its proper divisors (3668840).

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

2720440 is a wasteful number, since it uses less digits than its factorization.

2720440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 2720440 is about 1649.3756394466. The cubic root of 2720440 is about 139.5981674787.

It can be divided in two parts, 2720 and 440, that added together give a triangular number (3160 = T₇₉).

The spelling of 2720440 in words is "two million, seven hundred twenty thousand, four hundred forty".