28531214832 has 80 divisors (see below), whose sum is σ = 75551414400. Its totient is φ = 9273014016.

The previous prime is 28531214779. The next prime is 28531214843. The reversal of 28531214832 is 23841213582.

It is a congruent number.

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, 1199794 + ... + 1223342.

It is an arithmetic number, because the mean of its divisors is an integer number (944392680).

Almost surely, 2^28531214832 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 28531214832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37775707200).

28531214832 is an abundant number, since it is smaller than the sum of its proper divisors (47020199568).

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

28531214832 is a wasteful number, since it uses less digits than its factorization.

28531214832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24190 (or 24184 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The spelling of 28531214832 in words is "twenty-eight billion, five hundred thirty-one million, two hundred fourteen thousand, eight hundred thirty-two".