28234884520 has 128 divisors (see below), whose sum is σ = 69855035040. Its totient is φ = 10227548160.

The previous prime is 28234884467. The next prime is 28234884523. The reversal of 28234884520 is 2548843282.

It can be written as a sum of positive squares in 16 ways, for example, as 1154232676 + 27080651844 = 33974^2 + 164562^2 .

It is not an unprimeable number, because it can be changed into a prime (28234884523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2028304 + ... + 2042176.

Almost surely, 2^28234884520 is an apocalyptic number.

28234884520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28234884520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34927517520).

28234884520 is an abundant number, since it is smaller than the sum of its proper divisors (41620150520).

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

28234884520 is a wasteful number, since it uses less digits than its factorization.

28234884520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14015 (or 14011 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 46.

The spelling of 28234884520 in words is "twenty-eight billion, two hundred thirty-four million, eight hundred eighty-four thousand, five hundred twenty".