53158728 has 96 divisors (see below), whose sum is σ = 163749600. Its totient is φ = 14289408.

The previous prime is 53158709. The next prime is 53158753. The reversal of 53158728 is 82785135.

Its product of digits (67200) is a multiple of the sum of its prime divisors (2688).

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 23 ways as a sum of consecutive naturals, for example, 18663 + ... + 21321.

It is an arithmetic number, because the mean of its divisors is an integer number (1705725).

Almost surely, 2^53158728 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 53158728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81874800).

53158728 is an abundant number, since it is smaller than the sum of its proper divisors (110590872).

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

53158728 is a wasteful number, since it uses less digits than its factorization.

53158728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699 (or 2688 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 53158728 is about 7291.0032231511. The cubic root of 53158728 is about 376.0031876899.

The spelling of 53158728 in words is "fifty-three million, one hundred fifty-eight thousand, seven hundred twenty-eight".