2578989 has 16 divisors (see below), whose sum is σ = 3964928. Its totient is φ = 1460592.

The previous prime is 2578987. The next prime is 2578991. The reversal of 2578989 is 9898752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2578987) and next prime (2578991).

It is not a de Polignac number, because 2578989 - 2¹ = 2578987 is a prime.

It is a Duffinian number.

2578989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2184 + ... + 3150.

It is an arithmetic number, because the mean of its divisors is an integer number (247808).

2^2578989 is an apocalyptic number.

It is an amenable number.

2578989 is a deficient number, since it is larger than the sum of its proper divisors (1385939).

2578989 is a wasteful number, since it uses less digits than its factorization.

2578989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 362880, while the sum is 48.

The square root of 2578989 is about 1605.9230990306. The cubic root of 2578989 is about 137.1354796689.

It can be divided in two parts, 25789 and 89, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 2578989 in words is "two million, five hundred seventy-eight thousand, nine hundred eighty-nine".