65224640 has 56 divisors (see below), whose sum is σ = 167274240. Its totient is φ = 24081408.

The previous prime is 65224639. The next prime is 65224661. The reversal of 65224640 is 4642256.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3680 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (2987040).

Almost surely, 2^65224640 is an apocalyptic number.

It is an amenable number.

65224640 is an abundant number, since it is smaller than the sum of its proper divisors (102049600).

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

65224640 is a wasteful number, since it uses less digits than its factorization.

65224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15709 (or 15699 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 65224640 is about 8076.1773135562. The cubic root of 65224640 is about 402.5352308963.

Adding to 65224640 its reverse (4642256), we get a palindrome (69866896).

The spelling of 65224640 in words is "sixty-five million, two hundred twenty-four thousand, six hundred forty".