64240240 has 80 divisors (see below), whose sum is σ = 154677600. Its totient is φ = 24800256.

The previous prime is 64240223. The next prime is 64240247. The reversal of 64240240 is 4204246.

64240240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64240247) 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 15 ways as a sum of consecutive naturals, for example, 462091 + ... + 462229.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^64240240 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 64240240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77338800).

64240240 is an abundant number, since it is smaller than the sum of its proper divisors (90437360).

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

64240240 is a wasteful number, since it uses less digits than its factorization.

64240240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 64240240 is about 8015.0009357454. Note that the first 3 decimals coincide. The cubic root of 64240240 is about 400.4998750521.

Adding to 64240240 its reverse (4204246), we get a palindrome (68444486).

The spelling of 64240240 in words is "sixty-four million, two hundred forty thousand, two hundred forty".