64436443 has 16 divisors (see below), whose sum is σ = 69850080. Its totient is φ = 59222016.

The previous prime is 64436419. The next prime is 64436453. The reversal of 64436443 is 34463446.

It is a de Polignac number, because none of the positive numbers 2^k-64436443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64436399 and 64436408.

It is not an unprimeable number, because it can be changed into a prime (64436413) 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 15 ways as a sum of consecutive naturals, for example, 169828 + ... + 170206.

It is an arithmetic number, because the mean of its divisors is an integer number (4365630).

Almost surely, 2^64436443 is an apocalyptic number.

64436443 is a deficient number, since it is larger than the sum of its proper divisors (5413637).

64436443 is a wasteful number, since it uses less digits than its factorization.

64436443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its digits is 82944, while the sum is 34.

The square root of 64436443 is about 8027.2313408796. The cubic root of 64436443 is about 400.9071971777.

Adding to 64436443 its reverse (34463446), we get a palindrome (98899889).

The spelling of 64436443 in words is "sixty-four million, four hundred thirty-six thousand, four hundred forty-three".