2784638 has 16 divisors (see below), whose sum is σ = 4430160. Its totient is φ = 1310400.

The previous prime is 2784629. The next prime is 2784643. The reversal of 2784638 is 8364872.

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, 1793 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (276885).

2^2784638 is an apocalyptic number.

2784638 is a deficient number, since it is larger than the sum of its proper divisors (1645522).

2784638 is a wasteful number, since it uses less digits than its factorization.

2784638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its digits is 64512, while the sum is 38.

The square root of 2784638 is about 1668.7234642085. The cubic root of 2784638 is about 140.6877384584.

The spelling of 2784638 in words is "two million, seven hundred eighty-four thousand, six hundred thirty-eight".