64438845 has 8 divisors (see below), whose sum is σ = 103102176. Its totient is φ = 34367376.

The previous prime is 64438837. The next prime is 64438849. The reversal of 64438845 is 54883446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64438845 - 2³ = 64438837 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64438797 and 64438806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64438849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147947 + ... + 2147976.

It is an arithmetic number, because the mean of its divisors is an integer number (12887772).

Almost surely, 2^64438845 is an apocalyptic number.

It is an amenable number.

64438845 is a deficient number, since it is larger than the sum of its proper divisors (38663331).

64438845 is a wasteful number, since it uses less digits than its factorization.

64438845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295931.

The product of its digits is 368640, while the sum is 42.

The square root of 64438845 is about 8027.3809552058. The cubic root of 64438845 is about 400.9121786607.

The spelling of 64438845 in words is "sixty-four million, four hundred thirty-eight thousand, eight hundred forty-five".