2560720 has 20 divisors (see below), whose sum is σ = 5953860. Its totient is φ = 1024256.

The previous prime is 2560697. The next prime is 2560721. The reversal of 2560720 is 270652.

2560720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 274576 + 2286144 = 524^2 + 1512^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2560691 and 2560700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15925 + ... + 16084.

It is an arithmetic number, because the mean of its divisors is an integer number (297693).

2^2560720 is an apocalyptic number.

2560720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2560720 is an abundant number, since it is smaller than the sum of its proper divisors (3393140).

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

2560720 is a wasteful number, since it uses less digits than its factorization.

2560720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32022 (or 32016 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2560720 is about 1600.2249841819. The cubic root of 2560720 is about 136.8108993516.

The spelling of 2560720 in words is "two million, five hundred sixty thousand, seven hundred twenty".