28129230480 has 160 divisors (see below), whose sum is σ = 94057729920. Its totient is φ = 6913105920.

The previous prime is 28129230469. The next prime is 28129230497. The reversal of 28129230480 is 8403292182.

It is a super-2 number, since 2×28129230480² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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, 2049240 + ... + 2062920.

It is an arithmetic number, because the mean of its divisors is an integer number (587860812).

Almost surely, 2^28129230480 is an apocalyptic number.

28129230480 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 28129230480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47028864960).

28129230480 is an abundant number, since it is smaller than the sum of its proper divisors (65928499440).

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

28129230480 is a wasteful number, since it uses less digits than its factorization.

28129230480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14369 (or 14363 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 28129230480 in words is "twenty-eight billion, one hundred twenty-nine million, two hundred thirty thousand, four hundred eighty".