2578540 has 24 divisors (see below), whose sum is σ = 5448240. Its totient is φ = 1025088.

The previous prime is 2578529. The next prime is 2578559. The reversal of 2578540 is 458752.

2578540 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, 4299 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (227010).

2^2578540 is an apocalyptic number.

2578540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578540 is an abundant number, since it is smaller than the sum of its proper divisors (2869700).

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

2578540 is a wasteful number, since it uses less digits than its factorization.

2578540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 2578540 is about 1605.7832979577. The cubic root of 2578540 is about 137.1275208132.

The spelling of 2578540 in words is "two million, five hundred seventy-eight thousand, five hundred forty".