28615658832 has 160 divisors (see below), whose sum is σ = 82797855360. Its totient is φ = 9462251520.

The previous prime is 28615658779. The next prime is 28615658837. The reversal of 28615658832 is 23885651682.

28615658832 is a `hidden beast` number, since 2 + 8 + 6 + 1 + 56 + 588 + 3 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28615658837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41411607 + ... + 41412297.

It is an arithmetic number, because the mean of its divisors is an integer number (517486596).

Almost surely, 2^28615658832 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 28615658832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41398927680).

28615658832 is an abundant number, since it is smaller than the sum of its proper divisors (54182196528).

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

28615658832 is a wasteful number, since it uses less digits than its factorization.

28615658832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1326 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The spelling of 28615658832 in words is "twenty-eight billion, six hundred fifteen million, six hundred fifty-eight thousand, eight hundred thirty-two".