28023636672 has 168 divisors, whose sum is σ = 85373870400. Its totient is φ = 8758222848.

The previous prime is 28023636659. The next prime is 28023636677. The reversal of 28023636672 is 27663632082.

28023636672 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 3 + 636 + 6 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (28023636677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2628729 + ... + 2639367.

It is an arithmetic number, because the mean of its divisors is an integer number (508177800).

Almost surely, 2^28023636672 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 28023636672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42686935200).

28023636672 is an abundant number, since it is smaller than the sum of its proper divisors (57350233728).

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

28023636672 is a wasteful number, since it uses less digits than its factorization.

28023636672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10943 (or 10930 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 28023636672 in words is "twenty-eight billion, twenty-three million, six hundred thirty-six thousand, six hundred seventy-two".