64440324 has 72 divisors (see below), whose sum is σ = 184679040. Its totient is φ = 18781632.

The previous prime is 64440293. The next prime is 64440373. The reversal of 64440324 is 42304446.

64440324 = 66² + 67² + ... + 578².

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5269 + ... + 12515.

Almost surely, 2^64440324 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 64440324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92339520).

64440324 is an abundant number, since it is smaller than the sum of its proper divisors (120238716).

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

64440324 is a wasteful number, since it uses less digits than its factorization.

64440324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289 (or 7284 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64440324 is about 8027.4730768779. The cubic root of 64440324 is about 400.9152458819.

The spelling of 64440324 in words is "sixty-four million, four hundred forty thousand, three hundred twenty-four".