28743222816 has 864 divisors, whose sum is σ = 111262394880. Its totient is φ = 7185024000.

The previous prime is 28743222793. The next prime is 28743222839. The reversal of 28743222816 is 61822234782.

It is an interprime number because it is at equal distance from previous prime (28743222793) and next prime (28743222839).

It is a tau number, because it is divible by the number of its divisors (864).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 158802246 + ... + 158802426.

It is an arithmetic number, because the mean of its divisors is an integer number (128775920).

Almost surely, 2^28743222816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28743222816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55631197440).

28743222816 is an abundant number, since it is smaller than the sum of its proper divisors (82519172064).

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

28743222816 is a wasteful number, since it uses less digits than its factorization.

28743222816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 235 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 28743222816 in words is "twenty-eight billion, seven hundred forty-three million, two hundred twenty-two thousand, eight hundred sixteen".