53238728 has 16 divisors (see below), whose sum is σ = 100015260. Its totient is φ = 26568000.

The previous prime is 53238701. The next prime is 53238737. The reversal of 53238728 is 82783235.

53238728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52388644 + 850084 = 7238^2 + 922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53238691 and 53238700.

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 3 ways as a sum of consecutive naturals, for example, 1823 + ... + 10478.

Almost surely, 2^53238728 is an apocalyptic number.

It is an amenable number.

53238728 is a deficient number, since it is larger than the sum of its proper divisors (46776532).

53238728 is a wasteful number, since it uses less digits than its factorization.

53238728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12848 (or 12844 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 53238728 is about 7296.4873740725. The cubic root of 53238728 is about 376.1917122541.

The spelling of 53238728 in words is "fifty-three million, two hundred thirty-eight thousand, seven hundred twenty-eight".