28912163328 has 280 divisors, whose sum is σ = 87912560736. Its totient is φ = 9492940800.

The previous prime is 28912163327. The next prime is 28912163359. The reversal of 28912163328 is 82336121982.

28912163328 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 2 + 1 + 633 + 2 + 8 = 666.

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 (28912163323) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26500063 + ... + 26501153.

Almost surely, 2^28912163328 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 28912163328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43956280368).

28912163328 is an abundant number, since it is smaller than the sum of its proper divisors (59000397408).

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

28912163328 is an frugal number, since it uses more digits than its factorization.

28912163328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1167 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 28912163328 in words is "twenty-eight billion, nine hundred twelve million, one hundred sixty-three thousand, three hundred twenty-eight".