28044559 has 2 divisors, whose sum is σ = 28044560. Its totient is φ = 28044558.

The previous prime is 28044547. The next prime is 28044587. The reversal of 28044559 is 95544082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28044559 - 2⁷ = 28044431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28044059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14022279 + 14022280.

It is an arithmetic number, because the mean of its divisors is an integer number (14022280).

Almost surely, 2^28044559 is an apocalyptic number.

28044559 is a deficient number, since it is larger than the sum of its proper divisors (1).

28044559 is an equidigital number, since it uses as much as digits as its factorization.

28044559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28044559 is about 5295.7113780870. The cubic root of 28044559 is about 303.8198920157.

The spelling of 28044559 in words is "twenty-eight million, forty-four thousand, five hundred fifty-nine".