28058838 has 8 divisors (see below), whose sum is σ = 56117688. Its totient is φ = 9352944.

The previous prime is 28058837. The next prime is 28058851. The reversal of 28058838 is 83885082.

It is a sphenic number, since it is the product of 3 distinct primes.

28058838 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28058838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058837) 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, 2338231 + ... + 2338242.

It is an arithmetic number, because the mean of its divisors is an integer number (7014711).

Almost surely, 2^28058838 is an apocalyptic number.

28058838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28058838 is a wasteful number, since it uses less digits than its factorization.

28058838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676478.

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 28058838 is about 5297.0593728974. The cubic root of 28058838 is about 303.8714469735.

The spelling of 28058838 in words is "twenty-eight million, fifty-eight thousand, eight hundred thirty-eight".