2783638 has 16 divisors (see below), whose sum is σ = 4905936. Its totient is φ = 1167840.

The previous prime is 2783611. The next prime is 2783647. The reversal of 2783638 is 8363872.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2783597 and 2783606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (306621).

2^2783638 is an apocalyptic number.

2783638 is a deficient number, since it is larger than the sum of its proper divisors (2122298).

2783638 is a wasteful number, since it uses less digits than its factorization.

2783638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9759.

The product of its digits is 48384, while the sum is 37.

The square root of 2783638 is about 1668.4238070706. The cubic root of 2783638 is about 140.6708955051.

It can be divided in two parts, 278 and 3638, that added together give a triangular number (3916 = T₈₈).

The spelling of 2783638 in words is "two million, seven hundred eighty-three thousand, six hundred thirty-eight".