28504730880 has 216 divisors, whose sum is σ = 99585053568. Its totient is φ = 7527149568.

The previous prime is 28504730861. The next prime is 28504730887. The reversal of 28504730880 is 8803740582.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504730887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1174549 + ... + 1198571.

Almost surely, 2^28504730880 is an apocalyptic number.

28504730880 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 28504730880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49792526784).

28504730880 is an abundant number, since it is smaller than the sum of its proper divisors (71080322688).

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

28504730880 is a wasteful number, since it uses less digits than its factorization.

28504730880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24153 (or 24136 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 28504730880 in words is "twenty-eight billion, five hundred four million, seven hundred thirty thousand, eight hundred eighty".