64439841 has 8 divisors (see below), whose sum is σ = 86030784. Its totient is φ = 42904400.

The previous prime is 64439839. The next prime is 64439861. The reversal of 64439841 is 14893446.

It is a happy number.

64439841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 64439841 - 2¹ = 64439839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64439841.

It is not an unprimeable number, because it can be changed into a prime (64439861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11085 + ... + 15866.

It is an arithmetic number, because the mean of its divisors is an integer number (10753848).

Almost surely, 2^64439841 is an apocalyptic number.

It is an amenable number.

64439841 is a deficient number, since it is larger than the sum of its proper divisors (21590943).

64439841 is a wasteful number, since it uses less digits than its factorization.

64439841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27751.

The product of its digits is 82944, while the sum is 39.

The square root of 64439841 is about 8027.4429926347. The cubic root of 64439841 is about 400.9142442184.

The spelling of 64439841 in words is "sixty-four million, four hundred thirty-nine thousand, eight hundred forty-one".