53138660 has 24 divisors (see below), whose sum is σ = 114608760. Its totient is φ = 20680704.

The previous prime is 53138629. The next prime is 53138663. The reversal of 53138660 is 6683135.

53138660 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 4 ways, for example, as 5721664 + 47416996 = 2392^2 + 6886^2 .

It is not an unprimeable number, because it can be changed into a prime (53138663) by changing a digit.

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, 35165 + ... + 36644.

It is an arithmetic number, because the mean of its divisors is an integer number (4775365).

Almost surely, 2^53138660 is an apocalyptic number.

It is an amenable number.

53138660 is an abundant number, since it is smaller than the sum of its proper divisors (61470100).

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

53138660 is a wasteful number, since it uses less digits than its factorization.

53138660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71855 (or 71853 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 53138660 is about 7289.6268765966. The cubic root of 53138660 is about 375.9558666323.

The spelling of 53138660 in words is "fifty-three million, one hundred thirty-eight thousand, six hundred sixty".