28733138539560 has 2304 divisors, whose sum is σ = 127947013171200. Its totient is φ = 5706215424000.

The previous prime is 28733138539487. The next prime is 28733138539571. The reversal of 28733138539560 is 6593583133782.

28733138539560 is a `hidden beast` number, since 2 + 8 + 7 + 3 + 3 + 1 + 38 + 5 + 39 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 10258170160 + ... + 10258172960.

It is an arithmetic number, because the mean of its divisors is an integer number (55532557800).

Almost surely, 2^{28733138539560} is an apocalyptic number.

28733138539560 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 28733138539560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63973506585600).

28733138539560 is an abundant number, since it is smaller than the sum of its proper divisors (99213874631640).

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

28733138539560 is a wasteful number, since it uses less digits than its factorization.

28733138539560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 63.

The spelling of 28733138539560 in words is "twenty-eight trillion, seven hundred thirty-three billion, one hundred thirty-eight million, five hundred thirty-nine thousand, five hundred sixty".