28761821088 has 384 divisors, whose sum is σ = 101890897920. Its totient is φ = 6860574720.

The previous prime is 28761821063. The next prime is 28761821117. The reversal of 28761821088 is 88012816782.

It is a self number, because there is not a number n which added to its sum of digits gives 28761821088.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 22005331 + ... + 22006637.

It is an arithmetic number, because the mean of its divisors is an integer number (265340880).

Almost surely, 2^28761821088 is an apocalyptic number.

28761821088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28761821088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50945448960).

28761821088 is an abundant number, since it is smaller than the sum of its proper divisors (73129076832).

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

28761821088 is a wasteful number, since it uses less digits than its factorization.

28761821088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 51.

The spelling of 28761821088 in words is "twenty-eight billion, seven hundred sixty-one million, eight hundred twenty-one thousand, eighty-eight".