2578891 has 8 divisors (see below), whose sum is σ = 2957024. Its totient is φ = 2203200.

The previous prime is 2578879. The next prime is 2578907. The reversal of 2578891 is 1988752.

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 2578891 - 2¹³ = 2570699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578801) 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, 3901 + ... + 4513.

It is an arithmetic number, because the mean of its divisors is an integer number (369628).

2^2578891 is an apocalyptic number.

2578891 is a deficient number, since it is larger than the sum of its proper divisors (378133).

2578891 is an equidigital number, since it uses as much as digits as its factorization.

2578891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221.

The product of its digits is 40320, while the sum is 40.

The square root of 2578891 is about 1605.8925866944. The cubic root of 2578891 is about 137.1337426255.

The spelling of 2578891 in words is "two million, five hundred seventy-eight thousand, eight hundred ninety-one".