28111216896 has 243 divisors, whose sum is σ = 94473803151. Its totient is φ = 8015680512.

The previous prime is 28111216879. The next prime is 28111216897. The reversal of 28111216896 is 69861211182.

It is a happy number.

The square root of 28111216896 is 167664.

It is a perfect power (a square), and thus also a powerful number.

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

It is not an unprimeable number, because it can be changed into a prime (28111216897) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 56334855 + ... + 56335353.

Almost surely, 2^28111216896 is an apocalyptic number.

28111216896 is the 167664-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28111216896

28111216896 is an abundant number, since it is smaller than the sum of its proper divisors (66362586255).

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

28111216896 is an frugal number, since it uses more digits than its factorization.

28111216896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 511 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The spelling of 28111216896 in words is "twenty-eight billion, one hundred eleven million, two hundred sixteen thousand, eight hundred ninety-six".