40105405 has 8 divisors (see below), whose sum is σ = 49786200. Its totient is φ = 30977856.

The previous prime is 40105391. The next prime is 40105411. The reversal of 40105405 is 50450104.

It can be written as a sum of positive squares in 4 ways, for example, as 942841 + 39162564 = 971^2 + 6258^2 .

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 40105405 - 2⁷ = 40105277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138150 + ... + 138439.

It is an arithmetic number, because the mean of its divisors is an integer number (6223275).

Almost surely, 2^40105405 is an apocalyptic number.

It is an amenable number.

40105405 is a deficient number, since it is larger than the sum of its proper divisors (9680795).

40105405 is a wasteful number, since it uses less digits than its factorization.

40105405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276623.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 40105405 is about 6332.8828348549. The cubic root of 40105405 is about 342.2953258815.

Adding to 40105405 its reverse (50450104), we get a palindrome (90555509).

The spelling of 40105405 in words is "forty million, one hundred five thousand, four hundred five".