28551808000 has 88 divisors (see below), whose sum is σ = 71230834584. Its totient is φ = 11420672000.

The previous prime is 28551807983. The next prime is 28551808009. The reversal of 28551808000 is 80815582.

It can be written as a sum of positive squares in 4 ways, for example, as 2053177344 + 26498630656 = 45312^2 + 162784^2 .

It is not an unprimeable number, because it can be changed into a prime (28551808009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16470 + ... + 239530.

Almost surely, 2^28551808000 is an apocalyptic number.

28551808000 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 28551808000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35615417292).

28551808000 is an abundant number, since it is smaller than the sum of its proper divisors (42679026584).

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

28551808000 is an equidigital number, since it uses as much as digits as its factorization.

28551808000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223096 (or 223068 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 37.

The spelling of 28551808000 in words is "twenty-eight billion, five hundred fifty-one million, eight hundred eight thousand".