52240000 has 80 divisors (see below), whose sum is σ = 130247370. Its totient is φ = 20864000.

The previous prime is 52239989. The next prime is 52240043. The reversal of 52240000 is 4225.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 53824 + 52186176 = 232^2 + 7224^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 79674 + ... + 80326.

Almost surely, 2^52240000 is an apocalyptic number.

52240000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65123685).

52240000 is an abundant number, since it is smaller than the sum of its proper divisors (78007370).

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

52240000 is an frugal number, since it uses more digits than its factorization.

52240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 52240000 is about 7227.7243998371. The cubic root of 52240000 is about 373.8244669911.

Adding to 52240000 its reverse (4225), we get a palindrome (52244225).

The spelling of 52240000 in words is "fifty-two million, two hundred forty thousand".