53387568 has 180 divisors, whose sum is σ = 171968160. Its totient is φ = 15365376.

The previous prime is 53387561. The next prime is 53387573. The reversal of 53387568 is 86578335.

53387568 is a `hidden beast` number, since 5 + 3 + 3 + 87 + 568 = 666.

Its product of digits (604800) is a multiple of the sum of its prime factors (144).

It is not an unprimeable number, because it can be changed into a prime (53387561) 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 35 ways as a sum of consecutive naturals, for example, 675753 + ... + 675831.

Almost surely, 2^53387568 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 53387568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85984080).

53387568 is an abundant number, since it is smaller than the sum of its proper divisors (118580592).

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

53387568 is a wasteful number, since it uses less digits than its factorization.

53387568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 116 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 53387568 is about 7306.6796836867. The cubic root of 53387568 is about 376.5419602658.

The spelling of 53387568 in words is "fifty-three million, three hundred eighty-seven thousand, five hundred sixty-eight".