64605240 has 192 divisors, whose sum is σ = 248002560. Its totient is φ = 14273280.

The previous prime is 64605239. The next prime is 64605257. The reversal of 64605240 is 4250646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77707 + ... + 78533.

It is an arithmetic number, because the mean of its divisors is an integer number (1291680).

Almost surely, 2^64605240 is an apocalyptic number.

64605240 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 64605240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124001280).

64605240 is an abundant number, since it is smaller than the sum of its proper divisors (183397320).

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

64605240 is a wasteful number, since it uses less digits than its factorization.

64605240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 64605240 is about 8037.7384879082. The cubic root of 64605240 is about 401.2569626416.

Adding to 64605240 its reverse (4250646), we get a palindrome (68855886).

The spelling of 64605240 in words is "sixty-four million, six hundred five thousand, two hundred forty".