28639486272 has 112 divisors (see below), whose sum is σ = 76443840000. Its totient is φ = 9462566400.

The previous prime is 28639486247. The next prime is 28639486301. The reversal of 28639486272 is 27268493682.

It is a happy number.

It is a super-3 number, since 3×28639486272³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19104979 + ... + 19106477.

Almost surely, 2^28639486272 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 28639486272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38221920000).

28639486272 is an abundant number, since it is smaller than the sum of its proper divisors (47804353728).

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

28639486272 is a wasteful number, since it uses less digits than its factorization.

28639486272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2314 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 57.

The spelling of 28639486272 in words is "twenty-eight billion, six hundred thirty-nine million, four hundred eighty-six thousand, two hundred seventy-two".