52052440 has 64 divisors (see below), whose sum is σ = 128524320. Its totient is φ = 18816000.

The previous prime is 52052423. The next prime is 52052447. The reversal of 52052440 is 4425025.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52052447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123430 + ... + 123850.

Almost surely, 2^52052440 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 52052440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64262160).

52052440 is an abundant number, since it is smaller than the sum of its proper divisors (76471880).

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

52052440 is a wasteful number, since it uses less digits than its factorization.

52052440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 52052440 is about 7214.7376944696. The cubic root of 52052440 is about 373.3765433263.

Adding to 52052440 its reverse (4425025), we get a palindrome (56477465).

The spelling of 52052440 in words is "fifty-two million, fifty-two thousand, four hundred forty".