64728448 has 16 divisors (see below), whose sum is σ = 128951460. Its totient is φ = 32364160.

The previous prime is 64728439. The next prime is 64728449. The reversal of 64728448 is 84482746.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64728449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252718 + ... + 252973.

Almost surely, 2^64728448 is an apocalyptic number.

It is an amenable number.

64728448 is a deficient number, since it is larger than the sum of its proper divisors (64223012).

64728448 is an equidigital number, since it uses as much as digits as its factorization.

64728448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505705 (or 505693 counting only the distinct ones).

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

The square root of 64728448 is about 8045.3991821413. The cubic root of 64728448 is about 401.5118783599.

The spelling of 64728448 in words is "sixty-four million, seven hundred twenty-eight thousand, four hundred forty-eight".