2544389 has 4 divisors (see below), whose sum is σ = 2551020. Its totient is φ = 2537760.

The previous prime is 2544383. The next prime is 2544391. The reversal of 2544389 is 9834452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1144900 + 1399489 = 1070^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544389 - 2⁸ = 2544133 is a prime.

It is a d-powerful number, because it can be written as 2 + 5⁹ + 4 + 4⁴ + 3¹² + 8³ + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544383) 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, 2702 + ... + 3519.

It is an arithmetic number, because the mean of its divisors is an integer number (637755).

2^2544389 is an apocalyptic number.

It is an amenable number.

2544389 is a deficient number, since it is larger than the sum of its proper divisors (6631).

2544389 is an equidigital number, since it uses as much as digits as its factorization.

2544389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630.

The product of its digits is 34560, while the sum is 35.

The square root of 2544389 is about 1595.1141025018. The cubic root of 2544389 is about 136.5194415635.

The spelling of 2544389 in words is "two million, five hundred forty-four thousand, three hundred eighty-nine".