44389665 has 12 divisors (see below), whose sum is σ = 76942164. Its totient is φ = 23674464.

The previous prime is 44389663. The next prime is 44389679. The reversal of 44389665 is 56698344.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 11350161 = 5748^2 + 3369^2 .

It is not a de Polignac number, because 44389665 - 2¹ = 44389663 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 986437 = 44389665 / (4 + 4 + 3 + 8 + 9 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 44389665.

It is not an unprimeable number, because it can be changed into a prime (44389661) 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 11 ways as a sum of consecutive naturals, for example, 493174 + ... + 493263.

It is an arithmetic number, because the mean of its divisors is an integer number (6411847).

Almost surely, 2^44389665 is an apocalyptic number.

44389665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44389665 is a deficient number, since it is larger than the sum of its proper divisors (32552499).

44389665 is a wasteful number, since it uses less digits than its factorization.

44389665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986448 (or 986445 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 44389665 is about 6662.5569415953. The cubic root of 44389665 is about 354.0739336145.

It can be divided in two parts, 44389 and 665, that added together give a palindrome (45054).

The spelling of 44389665 in words is "forty-four million, three hundred eighty-nine thousand, six hundred sixty-five".