28552145272 has 64 divisors (see below), whose sum is σ = 64533600000. Its totient is φ = 11569153536.

The previous prime is 28552145249. The next prime is 28552145273. The reversal of 28552145272 is 27254125582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552145273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504048 + ... + 557824.

It is an arithmetic number, because the mean of its divisors is an integer number (1008337500).

Almost surely, 2^28552145272 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 28552145272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32266800000).

28552145272 is an abundant number, since it is smaller than the sum of its proper divisors (35981454728).

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

28552145272 is a wasteful number, since it uses less digits than its factorization.

28552145272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54308 (or 54304 counting only the distinct ones).

The product of its digits is 448000, while the sum is 43.

The spelling of 28552145272 in words is "twenty-eight billion, five hundred fifty-two million, one hundred forty-five thousand, two hundred seventy-two".