64188938 has 16 divisors (see below), whose sum is σ = 107480736. Its totient is φ = 28497840.

The previous prime is 64188913. The next prime is 64188953. The reversal of 64188938 is 83988146.

64188938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64188892 and 64188901.

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, 32981 + ... + 34872.

It is an arithmetic number, because the mean of its divisors is an integer number (6717546).

Almost surely, 2^64188938 is an apocalyptic number.

64188938 is a deficient number, since it is larger than the sum of its proper divisors (43291798).

64188938 is a wasteful number, since it uses less digits than its factorization.

64188938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67909.

The product of its digits is 331776, while the sum is 47.

The square root of 64188938 is about 8011.7999226141. The cubic root of 64188938 is about 400.3932341240.

The spelling of 64188938 in words is "sixty-four million, one hundred eighty-eight thousand, nine hundred thirty-eight".