64240320 has 112 divisors (see below), whose sum is σ = 207495648. Its totient is φ = 16834560.

The previous prime is 64240271. The next prime is 64240361. The reversal of 64240320 is 2304246.

It is a congruent number.

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, 58012 + ... + 59108.

Almost surely, 2^64240320 is an apocalyptic number.

64240320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64240320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103747824).

64240320 is an abundant number, since it is smaller than the sum of its proper divisors (143255328).

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

64240320 is a wasteful number, since it uses less digits than its factorization.

64240320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 64240320 is about 8015.0059263858. The cubic root of 64240320 is about 400.5000413029.

Adding to 64240320 its reverse (2304246), we get a palindrome (66544566).

The spelling of 64240320 in words is "sixty-four million, two hundred forty thousand, three hundred twenty".