64369728 has 84 divisors (see below), whose sum is σ = 191383920. Its totient is φ = 21451392.

The previous prime is 64369727. The next prime is 64369757. The reversal of 64369728 is 82796346.

It is not an unprimeable number, because it can be changed into a prime (64369727) 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 11 ways as a sum of consecutive naturals, for example, 13483 + ... + 17621.

It is an arithmetic number, because the mean of its divisors is an integer number (2278380).

Almost surely, 2^64369728 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 64369728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95691960).

64369728 is an abundant number, since it is smaller than the sum of its proper divisors (127014192).

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

64369728 is an equidigital number, since it uses as much as digits as its factorization.

64369728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166 (or 4144 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64369728 is about 8023.0747223244. The cubic root of 64369728 is about 400.7687881321.

The spelling of 64369728 in words is "sixty-four million, three hundred sixty-nine thousand, seven hundred twenty-eight".