65044220 has 24 divisors (see below), whose sum is σ = 143782800. Its totient is φ = 24648192.

The previous prime is 65044219. The next prime is 65044237. The reversal of 65044220 is 2244056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85205 + ... + 85964.

It is an arithmetic number, because the mean of its divisors is an integer number (5990950).

Almost surely, 2^65044220 is an apocalyptic number.

It is an amenable number.

65044220 is an abundant number, since it is smaller than the sum of its proper divisors (78738580).

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

65044220 is a wasteful number, since it uses less digits than its factorization.

65044220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171197 (or 171195 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 65044220 is about 8064.9996900186. Note that the first 3 decimals coincide. The cubic root of 65044220 is about 402.1637328792.

Adding to 65044220 its reverse (2244056), we get a palindrome (67288276).

The spelling of 65044220 in words is "sixty-five million, forty-four thousand, two hundred twenty".