2638724 has 12 divisors (see below), whose sum is σ = 5037648. Its totient is φ = 1199400.

The previous prime is 2638717. The next prime is 2638747. The reversal of 2638724 is 4278362.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 3² + 8³ + 7³ + 2²¹ + 4⁷ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29942 + ... + 30029.

It is an arithmetic number, because the mean of its divisors is an integer number (419804).

2^2638724 is an apocalyptic number.

It is an amenable number.

2638724 is a deficient number, since it is larger than the sum of its proper divisors (2398924).

2638724 is a wasteful number, since it uses less digits than its factorization.

2638724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59986 (or 59984 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 2638724 is about 1624.4149716129. The cubic root of 2638724 is about 138.1861940925.

The spelling of 2638724 in words is "two million, six hundred thirty-eight thousand, seven hundred twenty-four".