28058887 has 4 divisors (see below), whose sum is σ = 28106176. Its totient is φ = 28011600.

The previous prime is 28058869. The next prime is 28058893. The reversal of 28058887 is 78885082.

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 28058887 - 2²³ = 19670279 is a prime.

It is a super-2 number, since 2×28058887² = 1574602279357538, which contains 22 as substring.

It is a Duffinian number.

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 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, 22743 + ... + 23944.

It is an arithmetic number, because the mean of its divisors is an integer number (7026544).

Almost surely, 2^28058887 is an apocalyptic number.

28058887 is a deficient number, since it is larger than the sum of its proper divisors (47289).

28058887 is an equidigital number, since it uses as much as digits as its factorization.

28058887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47288.

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 28058887 is about 5297.0639981031. The cubic root of 28058887 is about 303.8716238601.

The spelling of 28058887 in words is "twenty-eight million, fifty-eight thousand, eight hundred eighty-seven".