28539841 has 4 divisors (see below), whose sum is σ = 31134384. Its totient is φ = 25945300.

The previous prime is 28539781. The next prime is 28539853. The reversal of 28539841 is 14893582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28539841 - 2¹¹ = 28537793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28539794 and 28539803.

It is not an unprimeable number, because it can be changed into a prime (28539241) 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, 1297255 + ... + 1297276.

It is an arithmetic number, because the mean of its divisors is an integer number (7783596).

Almost surely, 2^28539841 is an apocalyptic number.

It is an amenable number.

28539841 is a deficient number, since it is larger than the sum of its proper divisors (2594543).

28539841 is a wasteful number, since it uses less digits than its factorization.

28539841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594542.

The product of its digits is 69120, while the sum is 40.

The square root of 28539841 is about 5342.2692743814. The cubic root of 28539841 is about 305.5980061694.

The spelling of 28539841 in words is "twenty-eight million, five hundred thirty-nine thousand, eight hundred forty-one".