53186728 has 32 divisors (see below), whose sum is σ = 115090560. Its totient is φ = 22570560.

The previous prime is 53186713. The next prime is 53186729. The reversal of 53186728 is 82768135.

It is not an unprimeable number, because it can be changed into a prime (53186729) 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 7 ways as a sum of consecutive naturals, for example, 1158 + ... + 10378.

It is an arithmetic number, because the mean of its divisors is an integer number (3596580).

Almost surely, 2^53186728 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 53186728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57545280).

53186728 is an abundant number, since it is smaller than the sum of its proper divisors (61903832).

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

53186728 is a wasteful number, since it uses less digits than its factorization.

53186728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337 (or 9333 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 53186728 is about 7292.9231450770. The cubic root of 53186728 is about 376.0691927890.

The spelling of 53186728 in words is "fifty-three million, one hundred eighty-six thousand, seven hundred twenty-eight".