44640065 has 8 divisors (see below), whose sum is σ = 53634048. Its totient is φ = 35668080.

The previous prime is 44640061. The next prime is 44640067. The reversal of 44640065 is 56004644.

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

It is not a de Polignac number, because 44640065 - 2² = 44640061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44640061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641 + ... + 9470.

It is an arithmetic number, because the mean of its divisors is an integer number (6704256).

Almost surely, 2^44640065 is an apocalyptic number.

It is an amenable number.

44640065 is a deficient number, since it is larger than the sum of its proper divisors (8993983).

44640065 is a wasteful number, since it uses less digits than its factorization.

44640065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 44640065 is about 6681.3220997045. The cubic root of 44640065 is about 354.7384570969.

The spelling of 44640065 in words is "forty-four million, six hundred forty thousand, sixty-five".