52558440 has 128 divisors (see below), whose sum is σ = 178070400. Its totient is φ = 12293120.

The previous prime is 52558417. The next prime is 52558453. The reversal of 52558440 is 4485525.

52558440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37594 + ... + 38966.

It is an arithmetic number, because the mean of its divisors is an integer number (1391175).

Almost surely, 2^52558440 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 52558440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89035200).

52558440 is an abundant number, since it is smaller than the sum of its proper divisors (125511960).

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

52558440 is a wasteful number, since it uses less digits than its factorization.

52558440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 52558440 is about 7249.7199945929. The cubic root of 52558440 is about 374.5825042542.

It can be divided in two parts, 5255 and 8440, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 52558440 in words is "fifty-two million, five hundred fifty-eight thousand, four hundred forty".