52505720 has 32 divisors (see below), whose sum is σ = 118933920. Its totient is φ = 20860800.

The previous prime is 52505681. The next prime is 52505731. The reversal of 52505720 is 2750525.

It is a self number, because there is not a number n which added to its sum of digits gives 52505720.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 10386.

It is an arithmetic number, because the mean of its divisors is an integer number (3716685).

Almost surely, 2^52505720 is an apocalyptic number.

It is an amenable number.

52505720 is an abundant number, since it is smaller than the sum of its proper divisors (66428200).

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

52505720 is a wasteful number, since it uses less digits than its factorization.

52505720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8855 (or 8851 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 52505720 is about 7246.0830798439. The cubic root of 52505720 is about 374.4572177084.

The spelling of 52505720 in words is "fifty-two million, five hundred five thousand, seven hundred twenty".