28508708736 has 96 divisors (see below), whose sum is σ = 82627435800. Its totient is φ = 9434483712.

The previous prime is 28508708731. The next prime is 28508708797. The reversal of 28508708736 is 63780780582.

28508708736 is a `hidden beast` number, since 28 + 508 + 7 + 0 + 87 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28508708731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71110 + ... + 249146.

Almost surely, 2^28508708736 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 28508708736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41313717900).

28508708736 is an abundant number, since it is smaller than the sum of its proper divisors (54118727064).

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

28508708736 is a wasteful number, since it uses less digits than its factorization.

28508708736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178196 (or 178181 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 28508708736 in words is "twenty-eight billion, five hundred eight million, seven hundred eight thousand, seven hundred thirty-six".