12028156776 has 128 divisors (see below), whose sum is σ = 34487424000. Its totient is φ = 3882326976.

The previous prime is 12028156741. The next prime is 12028156793. The reversal of 12028156776 is 67765182021.

12028156776 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 81 + 567 + 7 + 6 = 666.

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 31 ways as a sum of consecutive naturals, for example, 846805 + ... + 860891.

It is an arithmetic number, because the mean of its divisors is an integer number (269433000).

Almost surely, 2^12028156776 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 12028156776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17243712000).

12028156776 is an abundant number, since it is smaller than the sum of its proper divisors (22459267224).

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

12028156776 is a wasteful number, since it uses less digits than its factorization.

12028156776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14228 (or 14218 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 12028156776 in words is "twelve billion, twenty-eight million, one hundred fifty-six thousand, seven hundred seventy-six".