28731488832 has 112 divisors (see below), whose sum is σ = 84589315200. Its totient is φ = 9563097600.

The previous prime is 28731488827. The next prime is 28731488857. The reversal of 28731488832 is 23888413782.

28731488832 is a `hidden beast` number, since 2 + 87 + 3 + 1 + 488 + 83 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1199469 + ... + 1223187.

Almost surely, 2^28731488832 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 28731488832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42294657600).

28731488832 is an abundant number, since it is smaller than the sum of its proper divisors (55857826368).

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

28731488832 is a wasteful number, since it uses less digits than its factorization.

28731488832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24441 (or 24425 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 54.

The spelling of 28731488832 in words is "twenty-eight billion, seven hundred thirty-one million, four hundred eighty-eight thousand, eight hundred thirty-two".