2578839 has 8 divisors (see below), whose sum is σ = 3518592. Its totient is φ = 1679160.

The previous prime is 2578837. The next prime is 2578847. The reversal of 2578839 is 9388752.

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

It is not a de Polignac number, because 2578839 - 2¹ = 2578837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2578839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578837) 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, 9867 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (439824).

2^2578839 is an apocalyptic number.

2578839 is a deficient number, since it is larger than the sum of its proper divisors (939753).

2578839 is a wasteful number, since it uses less digits than its factorization.

2578839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20037.

The product of its digits is 120960, while the sum is 42.

The square root of 2578839 is about 1605.8763962398. The cubic root of 2578839 is about 137.1328209111.

The spelling of 2578839 in words is "two million, five hundred seventy-eight thousand, eight hundred thirty-nine".