52440840 has 192 divisors, whose sum is σ = 182108160. Its totient is φ = 13063680.

The previous prime is 52440827. The next prime is 52440841. The reversal of 52440840 is 4804425.

It is not an unprimeable number, because it can be changed into a prime (52440841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412857 + ... + 412983.

It is an arithmetic number, because the mean of its divisors is an integer number (948480).

Almost surely, 2^52440840 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 52440840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91054080).

52440840 is an abundant number, since it is smaller than the sum of its proper divisors (129667320).

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

52440840 is a wasteful number, since it uses less digits than its factorization.

52440840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 52440840 is about 7241.6047945190. The cubic root of 52440840 is about 374.3029183420.

The spelling of 52440840 in words is "fifty-two million, four hundred forty thousand, eight hundred forty".