64688308 has 12 divisors (see below), whose sum is σ = 115123680. Its totient is φ = 31795832.

The previous prime is 64688303. The next prime is 64688329. The reversal of 64688308 is 80388646.

64688308 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 not an unprimeable number, because it can be changed into a prime (64688303) 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 3 ways as a sum of consecutive naturals, for example, 136816 + ... + 137287.

It is an arithmetic number, because the mean of its divisors is an integer number (9593640).

Almost surely, 2^64688308 is an apocalyptic number.

It is an amenable number.

64688308 is a deficient number, since it is larger than the sum of its proper divisors (50435372).

64688308 is a wasteful number, since it uses less digits than its factorization.

64688308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274166 (or 274164 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 64688308 is about 8042.9042018415. The cubic root of 64688308 is about 401.4288647860.

The spelling of 64688308 in words is "sixty-four million, six hundred eighty-eight thousand, three hundred eight".