28058389 has 4 divisors (see below), whose sum is σ = 28655424. Its totient is φ = 27461356.

The previous prime is 28058377. The next prime is 28058411. The reversal of 28058389 is 98385082.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98385082 = 2 ⋅49192541.

It is a cyclic number.

It is not a de Polignac number, because 28058389 - 2⁵ = 28058357 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 (28058189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298447 + ... + 298540.

It is an arithmetic number, because the mean of its divisors is an integer number (7163856).

Almost surely, 2^28058389 is an apocalyptic number.

It is an amenable number.

28058389 is a deficient number, since it is larger than the sum of its proper divisors (597035).

28058389 is an equidigital number, since it uses as much as digits as its factorization.

28058389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597034.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 28058389 is about 5297.0169907222. The cubic root of 28058389 is about 303.8698261057.

The spelling of 28058389 in words is "twenty-eight million, fifty-eight thousand, three hundred eighty-nine".