28172868607488 has 320 divisors, whose sum is σ = 83919007839744. Its totient is φ = 8324579328000.

The previous prime is 28172868607483. The next prime is 28172868607517. The reversal of 28172868607488 is 88470686827182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28172868607483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441573845 + ... + 1441593387.

Almost surely, 2^{28172868607488} 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 28172868607488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41959503919872).

28172868607488 is an abundant number, since it is smaller than the sum of its proper divisors (55746139232256).

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

28172868607488 is a wasteful number, since it uses less digits than its factorization.

28172868607488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21697 (or 21681 counting only the distinct ones).

The product of its (nonzero) digits is 924844032, while the sum is 75.

The spelling of 28172868607488 in words is "twenty-eight trillion, one hundred seventy-two billion, eight hundred sixty-eight million, six hundred seven thousand, four hundred eighty-eight".