2780004 has 48 divisors (see below), whose sum is σ = 6955200. Its totient is φ = 861696.

The previous prime is 2779991. The next prime is 2780039. The reversal of 2780004 is 4000872.

It is a happy number.

2780004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20224 + ... + 20360.

It is an arithmetic number, because the mean of its divisors is an integer number (144900).

2^2780004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2780004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3477600).

2780004 is an abundant number, since it is smaller than the sum of its proper divisors (4175196).

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

2780004 is a wasteful number, since it uses less digits than its factorization.

2780004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 2780004 is about 1667.3343995732. The cubic root of 2780004 is about 140.6096542267.

Adding to 2780004 its reverse (4000872), we get a palindrome (6780876).

The spelling of 2780004 in words is "two million, seven hundred eighty thousand, four".