52805520 has 200 divisors, whose sum is σ = 190400760. Its totient is φ = 13547520.

The previous prime is 52805479. The next prime is 52805521. The reversal of 52805520 is 2550825.

It can be written as a sum of positive squares in 4 ways, for example, as 8928144 + 43877376 = 2988^2 + 6624^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52805521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 187780 + ... + 188060.

Almost surely, 2^52805520 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 52805520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95200380).

52805520 is an abundant number, since it is smaller than the sum of its proper divisors (137595240).

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

52805520 is a wasteful number, since it uses less digits than its factorization.

52805520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 52805520 is about 7266.7406724060. The cubic root of 52805520 is about 375.1685642183.

The spelling of 52805520 in words is "fifty-two million, eight hundred five thousand, five hundred twenty".