28303158072 has 128 divisors (see below), whose sum is σ = 84438028800. Its totient is φ = 7734655488.

The previous prime is 28303158049. The next prime is 28303158073. The reversal of 28303158072 is 27085130382.

It is a self number, because there is not a number n which added to its sum of digits gives 28303158072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303158073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494158 + ... + 548450.

It is an arithmetic number, because the mean of its divisors is an integer number (659672100).

Almost surely, 2^28303158072 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 28303158072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42219014400).

28303158072 is an abundant number, since it is smaller than the sum of its proper divisors (56134870728).

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

28303158072 is a wasteful number, since it uses less digits than its factorization.

28303158072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54445 (or 54441 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 28303158072 in words is "twenty-eight billion, three hundred three million, one hundred fifty-eight thousand, seventy-two".