28938995712 has 240 divisors, whose sum is σ = 94302608400. Its totient is φ = 8768839680.

The previous prime is 28938995707. The next prime is 28938995731. The reversal of 28938995712 is 21759983982.

28938995712 is a `hidden beast` number, since 28 + 9 + 38 + 9 + 9 + 571 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28938995712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1816839 + ... + 1832697.

It is an arithmetic number, because the mean of its divisors is an integer number (392927535).

Almost surely, 2^28938995712 is an apocalyptic number.

28938995712 is a gapful number since it is divisible by the number (22) 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 28938995712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47151304200).

28938995712 is an abundant number, since it is smaller than the sum of its proper divisors (65363612688).

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

28938995712 is a wasteful number, since it uses less digits than its factorization.

28938995712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904 (or 15875 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 28938995712 in words is "twenty-eight billion, nine hundred thirty-eight million, nine hundred ninety-five thousand, seven hundred twelve".