40644105 has 16 divisors (see below), whose sum is σ = 67858560. Its totient is φ = 20734208.

The previous prime is 40644083. The next prime is 40644119. The reversal of 40644105 is 50144604.

It is a cyclic number.

It is not a de Polignac number, because 40644105 - 2⁶ = 40644041 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 58560 + ... + 59249.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^40644105 is an apocalyptic number.

It is an amenable number.

40644105 is a deficient number, since it is larger than the sum of its proper divisors (27214455).

40644105 is a wasteful number, since it uses less digits than its factorization.

40644105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117840.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40644105 is about 6375.2729353338. The cubic root of 40644105 is about 343.8210969195.

Adding to 40644105 its reverse (50144604), we get a palindrome (90788709).

The spelling of 40644105 in words is "forty million, six hundred forty-four thousand, one hundred five".