64688 has 20 divisors (see below), whose sum is σ = 135408. Its totient is φ = 29760.

The previous prime is 64679. The next prime is 64693. The reversal of 64688 is 88646.

It is a plaindrome in base 11.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 363.

2⁶⁴⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67704).

64688 is an abundant number, since it is smaller than the sum of its proper divisors (70720).

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

64688 is a wasteful number, since it uses less digits than its factorization.

64688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 326 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 64688 is about 254.3383573117. The cubic root of 64688 is about 40.1428227678.

The spelling of 64688 in words is "sixty-four thousand, six hundred eighty-eight".