40055405 has 16 divisors (see below), whose sum is σ = 51999024. Its totient is φ = 29445120.

The previous prime is 40055369. The next prime is 40055437. The reversal of 40055405 is 50455004.

40055405 is nontrivially palindromic in base 14.

40055405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1142761 + 38912644 = 1069^2 + 6238^2 .

It is not a de Polignac number, because 40055405 - 2⁸ = 40055149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14387 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (3249939).

Almost surely, 2^40055405 is an apocalyptic number.

It is an amenable number.

40055405 is a deficient number, since it is larger than the sum of its proper divisors (11943619).

40055405 is a wasteful number, since it uses less digits than its factorization.

40055405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 40055405 is about 6328.9339544666. The cubic root of 40055405 is about 342.1530185156.

The spelling of 40055405 in words is "forty million, fifty-five thousand, four hundred five".