28058556 has 12 divisors (see below), whose sum is σ = 65469992. Its totient is φ = 9352848.

The previous prime is 28058549. The next prime is 28058557. The reversal of 28058556 is 65585082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169095 + ... + 1169118.

Almost surely, 2^28058556 is an apocalyptic number.

It is an amenable number.

28058556 is an abundant number, since it is smaller than the sum of its proper divisors (37411436).

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

28058556 is a wasteful number, since it uses less digits than its factorization.

28058556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338220 (or 2338218 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 28058556 is about 5297.0327542880. The cubic root of 28058556 is about 303.8704289695.

The spelling of 28058556 in words is "twenty-eight million, fifty-eight thousand, five hundred fifty-six".