28921380626120 has 128 divisors (see below), whose sum is σ = 66740579942400. Its totient is φ = 11274255993600.

The previous prime is 28921380626119. The next prime is 28921380626207. The reversal of 28921380626120 is 2162608312982.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 957297815 + ... + 957328025.

It is an arithmetic number, because the mean of its divisors is an integer number (521410780800).

Almost surely, 2^{28921380626120} is an apocalyptic number.

28921380626120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28921380626120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33370289971200).

28921380626120 is an abundant number, since it is smaller than the sum of its proper divisors (37819199316280).

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

28921380626120 is a wasteful number, since it uses less digits than its factorization.

28921380626120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32419 (or 32415 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 28921380626120 in words is "twenty-eight trillion, nine hundred twenty-one billion, three hundred eighty million, six hundred twenty-six thousand, one hundred twenty".