28179328731840 has 448 divisors, whose sum is σ = 116789857067520. Its totient is φ = 6305863495680.

The previous prime is 28179328731823. The next prime is 28179328731877. The reversal of 28179328731840 is 4813782397182.

28179328731840 is a `hidden beast` number, since 2 + 8 + 179 + 3 + 287 + 3 + 184 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10168314 + ... + 12639353.

It is an arithmetic number, because the mean of its divisors is an integer number (260691645240).

Almost surely, 2^{28179328731840} is an apocalyptic number.

28179328731840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28179328731840 is an abundant number, since it is smaller than the sum of its proper divisors (88610528335680).

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

28179328731840 is a wasteful number, since it uses less digits than its factorization.

28179328731840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22807717 (or 22807701 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 28179328731840 in words is "twenty-eight trillion, one hundred seventy-nine billion, three hundred twenty-eight million, seven hundred thirty-one thousand, eight hundred forty".