28303734312 has 256 divisors, whose sum is σ = 94097203200. Its totient is φ = 7707363840.

The previous prime is 28303734287. The next prime is 28303734317. The reversal of 28303734312 is 21343730382.

28303734312 is a `hidden beast` number, since 2 + 8 + 303 + 7 + 34 + 312 = 666.

It is a super-2 number, since 2×28303734312² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28303734317) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10814028 + ... + 10816644.

It is an arithmetic number, because the mean of its divisors is an integer number (367567200).

Almost surely, 2^28303734312 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 28303734312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47048601600).

28303734312 is an abundant number, since it is smaller than the sum of its proper divisors (65793468888).

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

28303734312 is a wasteful number, since it uses less digits than its factorization.

28303734312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 28303734312 in words is "twenty-eight billion, three hundred three million, seven hundred thirty-four thousand, three hundred twelve".