53128816 has 40 divisors (see below), whose sum is σ = 112406000. Its totient is φ = 24178176.

The previous prime is 53128793. The next prime is 53128849. The reversal of 53128816 is 61882135.

53128816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13435 + ... + 16933.

It is an arithmetic number, because the mean of its divisors is an integer number (2810150).

Almost surely, 2^53128816 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 53128816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56203000).

53128816 is an abundant number, since it is smaller than the sum of its proper divisors (59277184).

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

53128816 is a wasteful number, since it uses less digits than its factorization.

53128816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593 (or 3587 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 53128816 is about 7288.9516392963. The cubic root of 53128816 is about 375.9326497747.

The spelling of 53128816 in words is "fifty-three million, one hundred twenty-eight thousand, eight hundred sixteen".