53999568 has 120 divisors (see below), whose sum is σ = 180375360. Its totient is φ = 15422400.

The previous prime is 53999503. The next prime is 53999587. The reversal of 53999568 is 86599935.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19893 + ... + 22443.

It is an arithmetic number, because the mean of its divisors is an integer number (1503128).

Almost surely, 2^53999568 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 53999568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90187680).

53999568 is an abundant number, since it is smaller than the sum of its proper divisors (126375792).

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

53999568 is a wasteful number, since it uses less digits than its factorization.

53999568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 2563 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 53999568 is about 7348.4398344138. The cubic root of 53999568 is about 377.9753070289.

The spelling of 53999568 in words is "fifty-three million, nine hundred ninety-nine thousand, five hundred sixty-eight".