28536439 has 8 divisors (see below), whose sum is σ = 29256048. Its totient is φ = 27825600.

The previous prime is 28536437. The next prime is 28536457. The reversal of 28536439 is 93463582.

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 28536439 - 2¹ = 28536437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28536437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4659 + ... + 8875.

It is an arithmetic number, because the mean of its divisors is an integer number (3657006).

Almost surely, 2^28536439 is an apocalyptic number.

28536439 is a deficient number, since it is larger than the sum of its proper divisors (719609).

28536439 is a wasteful number, since it uses less digits than its factorization.

28536439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385.

The product of its digits is 155520, while the sum is 40.

The square root of 28536439 is about 5341.9508608747. The cubic root of 28536439 is about 305.5858630776.

The spelling of 28536439 in words is "twenty-eight million, five hundred thirty-six thousand, four hundred thirty-nine".