2622639 has 4 divisors (see below), whose sum is σ = 3496856. Its totient is φ = 1748424.

The previous prime is 2622637. The next prime is 2622679. The reversal of 2622639 is 9362262.

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

It is not a de Polignac number, because 2622639 - 2¹ = 2622637 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2622637) 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, 437104 + ... + 437109.

It is an arithmetic number, because the mean of its divisors is an integer number (874214).

2^2622639 is an apocalyptic number.

2622639 is a deficient number, since it is larger than the sum of its proper divisors (874217).

2622639 is an equidigital number, since it uses as much as digits as its factorization.

2622639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874216.

The product of its digits is 7776, while the sum is 30.

The square root of 2622639 is about 1619.4563902742. The cubic root of 2622639 is about 137.9048388263.

The spelling of 2622639 in words is "two million, six hundred twenty-two thousand, six hundred thirty-nine".