52440400 has 30 divisors (see below), whose sum is σ = 125989022. Its totient is φ = 20976000.

The previous prime is 52440389. The next prime is 52440403. The reversal of 52440400 is 404425.

It can be written as a sum of positive squares in 3 ways, for example, as 2483776 + 49956624 = 1576^2 + 7068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52440403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65151 + ... + 65950.

Almost surely, 2^52440400 is an apocalyptic number.

52440400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

52440400 is an abundant number, since it is smaller than the sum of its proper divisors (73548622).

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

52440400 is a wasteful number, since it uses less digits than its factorization.

52440400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131119 (or 131108 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 52440400 is about 7241.5744144488. The cubic root of 52440400 is about 374.3018714878.

Adding to 52440400 its reverse (404425), we get a palindrome (52844825).

The spelling of 52440400 in words is "fifty-two million, four hundred forty thousand, four hundred".