65445438 has 16 divisors (see below), whose sum is σ = 132362640. Its totient is φ = 21569856.

The previous prime is 65445421. The next prime is 65445439. The reversal of 65445438 is 83454456.

It is a junction number, because it is equal to n+sod(n) for n = 65445396 and 65445405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65445439) by changing a digit.

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, 60745 + ... + 61812.

It is an arithmetic number, because the mean of its divisors is an integer number (8272665).

Almost surely, 2^65445438 is an apocalyptic number.

65445438 is an abundant number, since it is smaller than the sum of its proper divisors (66917202).

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

65445438 is a wasteful number, since it uses less digits than its factorization.

65445438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122651.

The product of its digits is 230400, while the sum is 39.

The square root of 65445438 is about 8089.8354742232. The cubic root of 65445438 is about 402.9889391435.

The spelling of 65445438 in words is "sixty-five million, four hundred forty-five thousand, four hundred thirty-eight".