28012053888 has 384 divisors, whose sum is σ = 99800064000. Its totient is φ = 7343861760.

The previous prime is 28012053887. The next prime is 28012054051. The reversal of 28012053888 is 88835021082.

28012053888 is a `hidden beast` number, since 28 + 0 + 12 + 0 + 538 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28012053887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20022213 + ... + 20023611.

It is an arithmetic number, because the mean of its divisors is an integer number (259896000).

Almost surely, 2^28012053888 is an apocalyptic number.

28012053888 is a gapful number since it is divisible by the number (28) 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 28012053888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49900032000).

28012053888 is an abundant number, since it is smaller than the sum of its proper divisors (71788010112).

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

28012053888 is a wasteful number, since it uses less digits than its factorization.

28012053888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 28012053888 in words is "twenty-eight billion, twelve million, fifty-three thousand, eight hundred eighty-eight".