64530444 has 48 divisors (see below), whose sum is σ = 168094080. Its totient is φ = 19098240.

The previous prime is 64530443. The next prime is 64530457. The reversal of 64530444 is 44403546.

It is not an unprimeable number, because it can be changed into a prime (64530443) 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 15 ways as a sum of consecutive naturals, for example, 9 + ... + 11360.

It is an arithmetic number, because the mean of its divisors is an integer number (3501960).

Almost surely, 2^64530444 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 64530444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84047040).

64530444 is an abundant number, since it is smaller than the sum of its proper divisors (103563636).

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

64530444 is a wasteful number, since it uses less digits than its factorization.

64530444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11430 (or 11428 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 64530444 is about 8033.0843391564. The cubic root of 64530444 is about 401.1020525785.

The spelling of 64530444 in words is "sixty-four million, five hundred thirty thousand, four hundred forty-four".