2591638 has 16 divisors (see below), whose sum is σ = 4677120. Its totient is φ = 1052136.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591638 is 8361952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4606 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (292320).

2^2591638 is an apocalyptic number.

2591638 is a deficient number, since it is larger than the sum of its proper divisors (2085482).

2591638 is a wasteful number, since it uses less digits than its factorization.

2591638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9771.

The product of its digits is 12960, while the sum is 34.

The square root of 2591638 is about 1609.8565153454. The cubic root of 2591638 is about 137.3593139544.

The spelling of 2591638 in words is "two million, five hundred ninety-one thousand, six hundred thirty-eight".