28758558816 has 240 divisors, whose sum is σ = 91293413904. Its totient is φ = 8828476416.

The previous prime is 28758558811. The next prime is 28758558833. The reversal of 28758558816 is 61885585782.

28758558816 is a `hidden beast` number, since 2 + 8 + 75 + 8 + 558 + 8 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758558811) 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 39 ways as a sum of consecutive naturals, for example, 22002835 + ... + 22004141.

Almost surely, 2^28758558816 is an apocalyptic number.

28758558816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28758558816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45646706952).

28758558816 is an abundant number, since it is smaller than the sum of its proper divisors (62534855088).

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

28758558816 is a wasteful number, since it uses less digits than its factorization.

28758558816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1978 counting only the distinct ones).

The product of its digits is 43008000, while the sum is 63.

The spelling of 28758558816 in words is "twenty-eight billion, seven hundred fifty-eight million, five hundred fifty-eight thousand, eight hundred sixteen".