2778589 has 8 divisors (see below), whose sum is σ = 3113568. Its totient is φ = 2457360.

The previous prime is 2778583. The next prime is 2778619. The reversal of 2778589 is 9858772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2778589 - 2¹¹ = 2776541 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 (2778583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3007 + ... + 3820.

It is an arithmetic number, because the mean of its divisors is an integer number (389196).

2^2778589 is an apocalyptic number.

It is an amenable number.

2778589 is a deficient number, since it is larger than the sum of its proper divisors (334979).

2778589 is a wasteful number, since it uses less digits than its factorization.

2778589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875.

The product of its digits is 282240, while the sum is 46.

The square root of 2778589 is about 1666.9100155677. The cubic root of 2778589 is about 140.5857937781.

The spelling of 2778589 in words is "two million, seven hundred seventy-eight thousand, five hundred eighty-nine".