28990144512 has 512 divisors, whose sum is σ = 102003916800. Its totient is φ = 7962624000.

The previous prime is 28990144507. The next prime is 28990144609. The reversal of 28990144512 is 21544109982.

It is a happy number.

28990144512 is a `hidden beast` number, since 2 + 8 + 9 + 90 + 1 + 44 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (512).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191987637 + ... + 191987787.

It is an arithmetic number, because the mean of its divisors is an integer number (199226400).

Almost surely, 2^28990144512 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 28990144512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51001958400).

28990144512 is an abundant number, since it is smaller than the sum of its proper divisors (73013772288).

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

28990144512 is an equidigital number, since it uses as much as digits as its factorization.

28990144512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 28990144512 in words is "twenty-eight billion, nine hundred ninety million, one hundred forty-four thousand, five hundred twelve".