64728844 has 6 divisors (see below), whose sum is σ = 113275484. Its totient is φ = 32364420.

The previous prime is 64728793. The next prime is 64728857. The reversal of 64728844 is 44882746.

It is a self number, because there is not a number n which added to its sum of digits gives 64728844.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8091102 + ... + 8091109.

Almost surely, 2^64728844 is an apocalyptic number.

It is an amenable number.

64728844 is a deficient number, since it is larger than the sum of its proper divisors (48546640).

64728844 is a wasteful number, since it uses less digits than its factorization.

64728844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16182215 (or 16182213 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 64728844 is about 8045.4237924425. The cubic root of 64728844 is about 401.5126971570.

The spelling of 64728844 in words is "sixty-four million, seven hundred twenty-eight thousand, eight hundred forty-four".