52505020728 has 48 divisors (see below), whose sum is σ = 142540561800. Its totient is φ = 17459893440.

The previous prime is 52505020723. The next prime is 52505020759. The reversal of 52505020728 is 82702050525.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52505020692 and 52505020701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52505020721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840043 + ... + 900378.

Almost surely, 2^52505020728 is an apocalyptic number.

It is an amenable number.

52505020728 is an abundant number, since it is smaller than the sum of its proper divisors (90035541072).

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

52505020728 is a wasteful number, since it uses less digits than its factorization.

52505020728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740852 (or 1740845 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 52505020728 in words is "fifty-two billion, five hundred five million, twenty thousand, seven hundred twenty-eight".