18228488280 has 128 divisors (see below), whose sum is σ = 57882988800. Its totient is φ = 4579545600.

The previous prime is 18228488249. The next prime is 18228488329. The reversal of 18228488280 is 8288482281.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 390595 + ... + 434765.

It is an arithmetic number, because the mean of its divisors is an integer number (452210850).

Almost surely, 2^18228488280 is an apocalyptic number.

18228488280 is a gapful number since it is divisible by the number (10) 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 18228488280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28941494400).

18228488280 is an abundant number, since it is smaller than the sum of its proper divisors (39654500520).

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

18228488280 is a wasteful number, since it uses less digits than its factorization.

18228488280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44385 (or 44381 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 51.

The spelling of 18228488280 in words is "eighteen billion, two hundred twenty-eight million, four hundred eighty-eight thousand, two hundred eighty".