28858839 has 4 divisors (see below), whose sum is σ = 38478456. Its totient is φ = 19239224.

The previous prime is 28858807. The next prime is 28858867. The reversal of 28858839 is 93885882.

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

It is a cyclic number.

It is not a de Polignac number, because 28858839 - 2⁵ = 28858807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28858791 and 28858800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28858889) 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, 4809804 + ... + 4809809.

It is an arithmetic number, because the mean of its divisors is an integer number (9619614).

Almost surely, 2^28858839 is an apocalyptic number.

28858839 is a deficient number, since it is larger than the sum of its proper divisors (9619617).

28858839 is an equidigital number, since it uses as much as digits as its factorization.

28858839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9619616.

The product of its digits is 1105920, while the sum is 51.

The square root of 28858839 is about 5372.0423490512. The cubic root of 28858839 is about 306.7323757799.

The spelling of 28858839 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred thirty-nine".