64436320 has 72 divisors (see below), whose sum is σ = 164910816. Its totient is φ = 23781888.

The previous prime is 64436299. The next prime is 64436327. The reversal of 64436320 is 2363446.

64436320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64436327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25849 + ... + 28231.

It is an arithmetic number, because the mean of its divisors is an integer number (2290428).

Almost surely, 2^64436320 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 64436320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82455408).

64436320 is an abundant number, since it is smaller than the sum of its proper divisors (100474496).

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

64436320 is a wasteful number, since it uses less digits than its factorization.

64436320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 64436320 is about 8027.2236794548. The cubic root of 64436320 is about 400.9069420860.

Adding to 64436320 its reverse (2363446), we get a palindrome (66799766).

The spelling of 64436320 in words is "sixty-four million, four hundred thirty-six thousand, three hundred twenty".