64328868 has 18 divisors (see below), whose sum is σ = 162609174. Its totient is φ = 21442944.

The previous prime is 64328863. The next prime is 64328881. The reversal of 64328868 is 86882346.

It is a happy number.

64328868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60093504 + 4235364 = 7752^2 + 2058^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×64328868² = 8276406516322848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64328863) 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 5 ways as a sum of consecutive naturals, for example, 893421 + ... + 893492.

It is an arithmetic number, because the mean of its divisors is an integer number (9033843).

Almost surely, 2^64328868 is an apocalyptic number.

It is an amenable number.

64328868 is an abundant number, since it is smaller than the sum of its proper divisors (98280306).

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

64328868 is a wasteful number, since it uses less digits than its factorization.

64328868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786923 (or 1786918 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 64328868 is about 8020.5279127998. The cubic root of 64328868 is about 400.6839714577.

The spelling of 64328868 in words is "sixty-four million, three hundred twenty-eight thousand, eight hundred sixty-eight".