28558039 has 4 divisors (see below), whose sum is σ = 28599480. Its totient is φ = 28516600.

The previous prime is 28558021. The next prime is 28558051. The reversal of 28558039 is 93085582.

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 28558039 - 2⁷ = 28557911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28557992 and 28558010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28558139) 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, 19669 + ... + 21070.

It is an arithmetic number, because the mean of its divisors is an integer number (7149870).

Almost surely, 2^28558039 is an apocalyptic number.

28558039 is a deficient number, since it is larger than the sum of its proper divisors (41441).

28558039 is an equidigital number, since it uses as much as digits as its factorization.

28558039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41440.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 28558039 is about 5343.9722117541. The cubic root of 28558039 is about 305.6629456916.

The spelling of 28558039 in words is "twenty-eight million, five hundred fifty-eight thousand, thirty-nine".