28228388580 has 288 divisors, whose sum is σ = 101418670080. Its totient is φ = 6219141120.

The previous prime is 28228388557. The next prime is 28228388659. The reversal of 28228388580 is 8588382282.

28228388580 is a `hidden beast` number, since 2 + 8 + 2 + 28 + 38 + 8 + 580 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10818316 + ... + 10820924.

It is an arithmetic number, because the mean of its divisors is an integer number (352148160).

Almost surely, 2^28228388580 is an apocalyptic number.

28228388580 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 28228388580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50709335040).

28228388580 is an abundant number, since it is smaller than the sum of its proper divisors (73190281500).

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

28228388580 is a wasteful number, since it uses less digits than its factorization.

28228388580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 2934 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 54.

The spelling of 28228388580 in words is "twenty-eight billion, two hundred twenty-eight million, three hundred eighty-eight thousand, five hundred eighty".