53408520 has 96 divisors (see below), whose sum is σ = 189371520. Its totient is φ = 12946560.

The previous prime is 53408419. The next prime is 53408521. The reversal of 53408520 is 2580435.

53408520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (53408521) 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 23 ways as a sum of consecutive naturals, for example, 2784 + ... + 10703.

It is an arithmetic number, because the mean of its divisors is an integer number (1972620).

Almost surely, 2^53408520 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 53408520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94685760).

53408520 is an abundant number, since it is smaller than the sum of its proper divisors (135963000).

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

53408520 is a wasteful number, since it uses less digits than its factorization.

53408520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515 (or 13508 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 53408520 is about 7308.1132996143. The cubic root of 53408520 is about 376.5912119026.

Adding to 53408520 its reverse (2580435), we get a palindrome (55988955).

The spelling of 53408520 in words is "fifty-three million, four hundred eight thousand, five hundred twenty".