2580638 has 4 divisors (see below), whose sum is σ = 3870960. Its totient is φ = 1290318.

The previous prime is 2580631. The next prime is 2580647. The reversal of 2580638 is 8360852.

2580638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580631) by changing a digit.

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 as a sum of consecutive naturals, namely, 645158 + ... + 645161.

It is an arithmetic number, because the mean of its divisors is an integer number (967740).

2^2580638 is an apocalyptic number.

2580638 is a deficient number, since it is larger than the sum of its proper divisors (1290322).

2580638 is a wasteful number, since it uses less digits than its factorization.

2580638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290321.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2580638 is about 1606.4364288698. The cubic root of 2580638 is about 137.1647014849.

The spelling of 2580638 in words is "two million, five hundred eighty thousand, six hundred thirty-eight".