52388440 has 32 divisors (see below), whose sum is σ = 126942480. Its totient is φ = 19343232.

The previous prime is 52388429. The next prime is 52388443. The reversal of 52388440 is 4488325.

52388440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 52388396 and 52388405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52388443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49854 + ... + 50893.

Almost surely, 2^52388440 is an apocalyptic number.

It is an amenable number.

52388440 is an abundant number, since it is smaller than the sum of its proper divisors (74554040).

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

52388440 is a wasteful number, since it uses less digits than its factorization.

52388440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100771 (or 100767 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 52388440 is about 7237.9859076956. The cubic root of 52388440 is about 374.1782063219.

The spelling of 52388440 in words is "fifty-two million, three hundred eighty-eight thousand, four hundred forty".