64684312 has 64 divisors (see below), whose sum is σ = 154368000. Its totient is φ = 25189920.

The previous prime is 64684289. The next prime is 64684313. The reversal of 64684312 is 21348646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64684313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29113 + ... + 31255.

It is an arithmetic number, because the mean of its divisors is an integer number (2412000).

Almost surely, 2^64684312 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 64684312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77184000).

64684312 is an abundant number, since it is smaller than the sum of its proper divisors (89683688).

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

64684312 is a wasteful number, since it uses less digits than its factorization.

64684312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2163 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 64684312 is about 8042.6557802756. The cubic root of 64684312 is about 401.4205987751.

The spelling of 64684312 in words is "sixty-four million, six hundred eighty-four thousand, three hundred twelve".