52005720 has 256 divisors, whose sum is σ = 186157440. Its totient is φ = 11501568.

The previous prime is 52005689. The next prime is 52005721. The reversal of 52005720 is 2750025.

52005720 is a modest number, since divided by 5720 gives 5200 as remainder.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 689 × 111 × 680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52005721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 981214 + ... + 981266.

Almost surely, 2^52005720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52005720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

52005720 is an abundant number, since it is smaller than the sum of its proper divisors (134151720).

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

52005720 is a wasteful number, since it uses less digits than its factorization.

52005720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 52005720 is about 7211.4991506621. The cubic root of 52005720 is about 373.2648010542.

Adding to 52005720 its reverse (2750025), we get a palindrome (54755745).

It can be divided in two parts, 52005 and 720, that added together give a palindrome (52725).

The spelling of 52005720 in words is "fifty-two million, five thousand, seven hundred twenty".