53640320 has 32 divisors (see below), whose sum is σ = 128235420. Its totient is φ = 21455872.

The previous prime is 53640319. The next prime is 53640329. The reversal of 53640320 is 2304635.

It can be written as a sum of positive squares in 2 ways, for example, as 51724864 + 1915456 = 7192^2 + 1384^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (53640329) 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 3 ways as a sum of consecutive naturals, for example, 41267 + ... + 42546.

Almost surely, 2^53640320 is an apocalyptic number.

It is an amenable number.

53640320 is an abundant number, since it is smaller than the sum of its proper divisors (74595100).

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

53640320 is an equidigital number, since it uses as much as digits as its factorization.

53640320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83832 (or 83820 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 53640320 is about 7323.9552155922. The cubic root of 53640320 is about 377.1352440634.

Adding to 53640320 its reverse (2304635), we get a palindrome (55944955).

The spelling of 53640320 in words is "fifty-three million, six hundred forty thousand, three hundred twenty".