28859039550 has 432 divisors, whose sum is σ = 90113482368. Its totient is φ = 6565046400.

The previous prime is 28859039543. The next prime is 28859039563. The reversal of 28859039550 is 5593095882.

28859039550 is a `hidden beast` number, since 2 + 8 + 8 + 59 + 0 + 39 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 269710597 + ... + 269710703.

It is an arithmetic number, because the mean of its divisors is an integer number (208596024).

Almost surely, 2^28859039550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28859039550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45056741184).

28859039550 is an abundant number, since it is smaller than the sum of its proper divisors (61254442818).

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

28859039550 is a wasteful number, since it uses less digits than its factorization.

28859039550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 28859039550 in words is "twenty-eight billion, eight hundred fifty-nine million, thirty-nine thousand, five hundred fifty".