28129519488 has 64 divisors (see below), whose sum is σ = 85393192320. Its totient is φ = 8037004800.

The previous prime is 28129519487. The next prime is 28129519571. The reversal of 28129519488 is 88491592182.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28129519487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5229738 + ... + 5235113.

It is an arithmetic number, because the mean of its divisors is an integer number (1334268630).

Almost surely, 2^28129519488 is an apocalyptic number.

28129519488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28129519488 is an abundant number, since it is smaller than the sum of its proper divisors (57263672832).

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

28129519488 is a wasteful number, since it uses less digits than its factorization.

28129519488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464875 (or 10464863 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 57.

The spelling of 28129519488 in words is "twenty-eight billion, one hundred twenty-nine million, five hundred nineteen thousand, four hundred eighty-eight".