28318018280 has 16 divisors (see below), whose sum is σ = 63715541220. Its totient is φ = 11327207296.

The previous prime is 28318018279. The next prime is 28318018303. The reversal of 28318018280 is 8281081382.

It can be written as a sum of positive squares in 2 ways, for example, as 26256313444 + 2061704836 = 162038^2 + 45406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353975189 + ... + 353975268.

Almost surely, 2^28318018280 is an apocalyptic number.

28318018280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28318018280 is an abundant number, since it is smaller than the sum of its proper divisors (35397522940).

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

28318018280 is a wasteful number, since it uses less digits than its factorization.

28318018280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707950468 (or 707950464 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The spelling of 28318018280 in words is "twenty-eight billion, three hundred eighteen million, eighteen thousand, two hundred eighty".