2638321 has 16 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 2107728.

The previous prime is 2638319. The next prime is 2638327. The reversal of 2638321 is 1238362.

It is not a de Polignac number, because 2638321 - 2¹ = 2638319 is a prime.

2638321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2638327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10920 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (201600).

2^2638321 is an apocalyptic number.

It is an amenable number.

2638321 is a deficient number, since it is larger than the sum of its proper divisors (587279).

2638321 is a wasteful number, since it uses less digits than its factorization.

2638321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its digits is 1728, while the sum is 25.

The square root of 2638321 is about 1624.2909222181. The cubic root of 2638321 is about 138.1791588902.

The spelling of 2638321 in words is "two million, six hundred thirty-eight thousand, three hundred twenty-one".