64443336 has 64 divisors (see below), whose sum is σ = 169905600. Its totient is φ = 20337408.

The previous prime is 64443331. The next prime is 64443341. The reversal of 64443336 is 63334446.

It is an interprime number because it is at equal distance from previous prime (64443331) and next prime (64443341).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 64443297 and 64443306.

It is not an unprimeable number, because it can be changed into a prime (64443331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36015 + ... + 37761.

It is an arithmetic number, because the mean of its divisors is an integer number (2654775).

Almost surely, 2^64443336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64443336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84952800).

64443336 is an abundant number, since it is smaller than the sum of its proper divisors (105462264).

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

64443336 is a wasteful number, since it uses less digits than its factorization.

64443336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838 (or 1834 counting only the distinct ones).

The product of its digits is 62208, while the sum is 33.

The square root of 64443336 is about 8027.6606804224. The cubic root of 64443336 is about 400.9214921670.

The spelling of 64443336 in words is "sixty-four million, four hundred forty-three thousand, three hundred thirty-six".