65144424 has 32 divisors (see below), whose sum is σ = 164545920. Its totient is φ = 21490176.

The previous prime is 65144413. The next prime is 65144447. The reversal of 65144424 is 42444156.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 65144391 and 65144400.

It is an unprimeable number.

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, 11664 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (5142060).

Almost surely, 2^65144424 is an apocalyptic number.

It is an amenable number.

65144424 is an abundant number, since it is smaller than the sum of its proper divisors (99401496).

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

65144424 is a wasteful number, since it uses less digits than its factorization.

65144424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28089 (or 28085 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 65144424 is about 8071.2095747787. The cubic root of 65144424 is about 402.3701449603.

The spelling of 65144424 in words is "sixty-five million, one hundred forty-four thousand, four hundred twenty-four".