52508240 has 40 divisors (see below), whose sum is σ = 129266280. Its totient is φ = 19767296.

The previous prime is 52508233. The next prime is 52508279. The reversal of 52508240 is 4280525.

It can be written as a sum of positive squares in 4 ways, for example, as 6431296 + 46076944 = 2536^2 + 6788^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17945 + ... + 20664.

It is an arithmetic number, because the mean of its divisors is an integer number (3231657).

Almost surely, 2^52508240 is an apocalyptic number.

It is an amenable number.

52508240 is an abundant number, since it is smaller than the sum of its proper divisors (76758040).

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

52508240 is a wasteful number, since it uses less digits than its factorization.

52508240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38639 (or 38633 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 52508240 is about 7246.2569648060. The cubic root of 52508240 is about 374.4632082753.

Adding to 52508240 its reverse (4280525), we get a palindrome (56788765).

The spelling of 52508240 in words is "fifty-two million, five hundred eight thousand, two hundred forty".