2678784 has 56 divisors (see below), whose sum is σ = 7208520. Its totient is φ = 884736.

The previous prime is 2678749. The next prime is 2678789. The reversal of 2678784 is 4878762.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24522 + ... + 24630.

2^2678784 is an apocalyptic number.

2678784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2678784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3604260).

2678784 is an abundant number, since it is smaller than the sum of its proper divisors (4529736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2678784 is an equidigital number, since it uses as much as digits as its factorization.

2678784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 114 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 2678784 is about 1636.6991171257. The cubic root of 2678784 is about 138.8819797689.

The spelling of 2678784 in words is "two million, six hundred seventy-eight thousand, seven hundred eighty-four".