65044940 has 24 divisors (see below), whose sum is σ = 138635952. Its totient is φ = 25629120.

The previous prime is 65044933. The next prime is 65044949. The reversal of 65044940 is 4944056.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 65044897 and 65044906.

It is not an unprimeable number, because it can be changed into a prime (65044949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22931 + ... + 25610.

It is an arithmetic number, because the mean of its divisors is an integer number (5776498).

Almost surely, 2^65044940 is an apocalyptic number.

It is an amenable number.

65044940 is an abundant number, since it is smaller than the sum of its proper divisors (73591012).

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

65044940 is a wasteful number, since it uses less digits than its factorization.

65044940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48617 (or 48615 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 65044940 is about 8065.0443272185. The cubic root of 65044940 is about 402.1652167764.

Adding to 65044940 its reverse (4944056), we get a palindrome (69988996).

The spelling of 65044940 in words is "sixty-five million, forty-four thousand, nine hundred forty".