64728168 has 16 divisors (see below), whose sum is σ = 161820480. Its totient is φ = 21576048.

The previous prime is 64728161. The next prime is 64728179. The reversal of 64728168 is 86182746.

It is not an unprimeable number, because it can be changed into a prime (64728161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348480 + ... + 1348527.

It is an arithmetic number, because the mean of its divisors is an integer number (10113780).

Almost surely, 2^64728168 is an apocalyptic number.

It is an amenable number.

64728168 is an abundant number, since it is smaller than the sum of its proper divisors (97092312).

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

64728168 is a wasteful number, since it uses less digits than its factorization.

64728168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697016 (or 2697012 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 64728168 is about 8045.3817808728. The cubic root of 64728168 is about 401.5112994105.

The spelling of 64728168 in words is "sixty-four million, seven hundred twenty-eight thousand, one hundred sixty-eight".