64415240 has 32 divisors (see below), whose sum is σ = 145817280. Its totient is φ = 25609152.

The previous prime is 64415237. The next prime is 64415243. The reversal of 64415240 is 4251446.

64415240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64415237) and next prime (64415243).

It is not an unprimeable number, because it can be changed into a prime (64415243) 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 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (4556790).

Almost surely, 2^64415240 is an apocalyptic number.

It is an amenable number.

64415240 is an abundant number, since it is smaller than the sum of its proper divisors (81402040).

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

64415240 is a wasteful number, since it uses less digits than its factorization.

64415240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821 (or 9817 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 64415240 is about 8025.9105402440. The cubic root of 64415240 is about 400.8632191251.

Adding to 64415240 its reverse (4251446), we get a palindrome (68666686).

The spelling of 64415240 in words is "sixty-four million, four hundred fifteen thousand, two hundred forty".