2640884 has 12 divisors (see below), whose sum is σ = 4709124. Its totient is φ = 1295424.

The previous prime is 2640881. The next prime is 2640889. The reversal of 2640884 is 4880462.

2640884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 595984 = 1430^2 + 772^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2640884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6017 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (392427).

2^2640884 is an apocalyptic number.

It is an amenable number.

2640884 is a deficient number, since it is larger than the sum of its proper divisors (2068240).

2640884 is a wasteful number, since it uses less digits than its factorization.

2640884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12514 (or 12512 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 2640884 is about 1625.0796903537. The cubic root of 2640884 is about 138.2238891770.

The spelling of 2640884 in words is "two million, six hundred forty thousand, eight hundred eighty-four".