28115944272 has 120 divisors (see below), whose sum is σ = 84984498144. Its totient is φ = 8625929472.

The previous prime is 28115944271. The next prime is 28115944273. The reversal of 28115944272 is 27244951182.

28115944272 is a `hidden beast` number, since 2 + 8 + 11 + 594 + 42 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28115944271) and next prime (28115944273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28115944271) 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 23 ways as a sum of consecutive naturals, for example, 627943 + ... + 671225.

Almost surely, 2^28115944272 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 28115944272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42492249072).

28115944272 is an abundant number, since it is smaller than the sum of its proper divisors (56868553872).

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

28115944272 is a wasteful number, since it uses less digits than its factorization.

28115944272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43657 (or 43648 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 28115944272 in words is "twenty-eight billion, one hundred fifteen million, nine hundred forty-four thousand, two hundred seventy-two".