28886155776 has 120 divisors (see below), whose sum is σ = 83476493100. Its totient is φ = 9616121856.

The previous prime is 28886155769. The next prime is 28886155777. The reversal of 28886155776 is 67755168882.

28886155776 is a `hidden beast` number, since 2 + 8 + 8 + 8 + 6 + 1 + 557 + 76 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28014725376 + 871430400 = 167376^2 + 29520^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28886155777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3926950 + ... + 3934298.

Almost surely, 2^28886155776 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 28886155776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41738246550).

28886155776 is an abundant number, since it is smaller than the sum of its proper divisors (54590337324).

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

28886155776 is an equidigital number, since it uses as much as digits as its factorization.

28886155776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226 (or 8207 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 63.

The spelling of 28886155776 in words is "twenty-eight billion, eight hundred eighty-six million, one hundred fifty-five thousand, seven hundred seventy-six".