2640339 has 12 divisors (see below), whose sum is σ = 4107376. Its totient is φ = 1624752.

The previous prime is 2640317. The next prime is 2640343. The reversal of 2640339 is 9330462.

It is not a de Polignac number, because 2640339 - 2⁹ = 2639827 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2640349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11167 + ... + 11400.

2^2640339 is an apocalyptic number.

2640339 is a deficient number, since it is larger than the sum of its proper divisors (1467037).

2640339 is a wasteful number, since it uses less digits than its factorization.

2640339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22586 (or 22583 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 2640339 is about 1624.9119976171. The cubic root of 2640339 is about 138.2143800881.

The spelling of 2640339 in words is "two million, six hundred forty thousand, three hundred thirty-nine".