64289328 has 80 divisors (see below), whose sum is σ = 170748000. Its totient is φ = 20838400.

The previous prime is 64289311. The next prime is 64289333. The reversal of 64289328 is 82398246.

It is a self number, because there is not a number n which added to its sum of digits gives 64289328.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431398 + ... + 431546.

It is an arithmetic number, because the mean of its divisors is an integer number (2134350).

Almost surely, 2^64289328 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 64289328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85374000).

64289328 is an abundant number, since it is smaller than the sum of its proper divisors (106458672).

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

64289328 is a wasteful number, since it uses less digits than its factorization.

64289328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 64289328 is about 8018.0626088850. The cubic root of 64289328 is about 400.6018606219.

The spelling of 64289328 in words is "sixty-four million, two hundred eighty-nine thousand, three hundred twenty-eight".