28851645312 has 800 divisors, whose sum is σ = 107166820200. Its totient is φ = 7681443840.

The previous prime is 28851645269. The next prime is 28851645313. The reversal of 28851645312 is 21354615882.

28851645312 is a `hidden beast` number, since 2 + 8 + 8 + 51 + 64 + 531 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28851645313) 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 99 ways as a sum of consecutive naturals, for example, 472977762 + ... + 472977822.

Almost surely, 2^28851645312 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 28851645312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53583410100).

28851645312 is an abundant number, since it is smaller than the sum of its proper divisors (78315174888).

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

28851645312 is an frugal number, since it uses more digits than its factorization.

28851645312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 92 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 28851645312 in words is "twenty-eight billion, eight hundred fifty-one million, six hundred forty-five thousand, three hundred twelve".