64505238 has 32 divisors (see below), whose sum is σ = 149314560. Its totient is φ = 18195840.

The previous prime is 64505227. The next prime is 64505239. The reversal of 64505238 is 83250546.

64505238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64505199 and 64505208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505239) 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 15 ways as a sum of consecutive naturals, for example, 6403 + ... + 13038.

It is an arithmetic number, because the mean of its divisors is an integer number (4666080).

Almost surely, 2^64505238 is an apocalyptic number.

64505238 is an abundant number, since it is smaller than the sum of its proper divisors (84809322).

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

64505238 is a wasteful number, since it uses less digits than its factorization.

64505238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19532.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 64505238 is about 8031.5152991201. The cubic root of 64505238 is about 401.0498214435.

The spelling of 64505238 in words is "sixty-four million, five hundred five thousand, two hundred thirty-eight".