2578889 has 4 divisors (see below), whose sum is σ = 2714640. Its totient is φ = 2443140.

The previous prime is 2578879. The next prime is 2578907. The reversal of 2578889 is 9888752.

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 2578889 - 2¹⁶ = 2513353 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2578819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67847 + ... + 67884.

It is an arithmetic number, because the mean of its divisors is an integer number (678660).

2^2578889 is an apocalyptic number.

It is an amenable number.

2578889 is a deficient number, since it is larger than the sum of its proper divisors (135751).

2578889 is a wasteful number, since it uses less digits than its factorization.

2578889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135750.

The product of its digits is 322560, while the sum is 47.

The square root of 2578889 is about 1605.8919639876. The cubic root of 2578889 is about 137.1337071752.

The spelling of 2578889 in words is "two million, five hundred seventy-eight thousand, eight hundred eighty-nine".