28355036688 has 240 divisors, whose sum is σ = 93713198400. Its totient is φ = 8139709440.

The previous prime is 28355036683. The next prime is 28355036747. The reversal of 28355036688 is 88663055382.

28355036688 is a `hidden beast` number, since 2 + 8 + 3 + 550 + 3 + 6 + 6 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28355036683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1707208 + ... + 1723736.

It is an arithmetic number, because the mean of its divisors is an integer number (390471660).

Almost surely, 2^28355036688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28355036688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46856599200).

28355036688 is an abundant number, since it is smaller than the sum of its proper divisors (65358161712).

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

28355036688 is a wasteful number, since it uses less digits than its factorization.

28355036688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16595 (or 16564 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 28355036688 in words is "twenty-eight billion, three hundred fifty-five million, thirty-six thousand, six hundred eighty-eight".