2784389 has 4 divisors (see below), whose sum is σ = 2874240. Its totient is φ = 2694540.

The previous prime is 2784373. The next prime is 2784473. The reversal of 2784389 is 9834872.

2784389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2784389 - 2⁴ = 2784373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2784329) 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, 44879 + ... + 44940.

It is an arithmetic number, because the mean of its divisors is an integer number (718560).

2^2784389 is an apocalyptic number.

It is an amenable number.

2784389 is a deficient number, since it is larger than the sum of its proper divisors (89851).

2784389 is an equidigital number, since it uses as much as digits as its factorization.

2784389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89850.

The product of its digits is 96768, while the sum is 41.

The square root of 2784389 is about 1668.6488546126. The cubic root of 2784389 is about 140.6835449401.

The spelling of 2784389 in words is "two million, seven hundred eighty-four thousand, three hundred eighty-nine".