64324240 has 40 divisors (see below), whose sum is σ = 150671160. Its totient is φ = 25537536.

The previous prime is 64324237. The next prime is 64324283. The reversal of 64324240 is 4242346.

It can be written as a sum of positive squares in 4 ways, for example, as 1089936 + 63234304 = 1044^2 + 7952^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 8026 + ... + 13894.

It is an arithmetic number, because the mean of its divisors is an integer number (3766779).

Almost surely, 2^64324240 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 64324240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75335580).

64324240 is an abundant number, since it is smaller than the sum of its proper divisors (86346920).

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

64324240 is a wasteful number, since it uses less digits than its factorization.

64324240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019 (or 6013 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 64324240 is about 8020.2393979232. The cubic root of 64324240 is about 400.6743624493.

Adding to 64324240 its reverse (4242346), we get a palindrome (68566586).

The spelling of 64324240 in words is "sixty-four million, three hundred twenty-four thousand, two hundred forty".