44090909 has 4 divisors (see below), whose sum is σ = 44196060. Its totient is φ = 43985760.

The previous prime is 44090881. The next prime is 44090923. The reversal of 44090909 is 90909044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20839225 + 23251684 = 4565^2 + 4822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44090909 is a prime.

It is a Duffinian number.

44090909 is a modest number, since divided by 90909 gives 44 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44090989) 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 3 ways as a sum of consecutive naturals, for example, 51944 + ... + 52785.

It is an arithmetic number, because the mean of its divisors is an integer number (11049015).

Almost surely, 2^44090909 is an apocalyptic number.

It is an amenable number.

44090909 is a deficient number, since it is larger than the sum of its proper divisors (105151).

44090909 is a wasteful number, since it uses less digits than its factorization.

44090909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105150.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 44090909 is about 6640.0985685455. The cubic root of 44090909 is about 353.2778029698.

The spelling of 44090909 in words is "forty-four million, ninety thousand, nine hundred nine".