28047539520 has 2240 divisors, whose sum is σ = 142755250176. Its totient is φ = 5036359680.

The previous prime is 28047539501. The next prime is 28047539537. The reversal of 28047539520 is 2593574082.

28047539520 is a `hidden beast` number, since 2 + 80 + 47 + 5 + 3 + 9 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (2240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 596756137 + ... + 596756183.

Almost surely, 2^28047539520 is an apocalyptic number.

28047539520 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 28047539520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71377625088).

28047539520 is an abundant number, since it is smaller than the sum of its proper divisors (114707710656).

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

28047539520 is a wasteful number, since it uses less digits than its factorization.

28047539520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 28047539520 in words is "twenty-eight billion, forty-seven million, five hundred thirty-nine thousand, five hundred twenty".