40003405 has 8 divisors (see below), whose sum is σ = 51696792. Its totient is φ = 29540928.

The previous prime is 40003391. The next prime is 40003409. The reversal of 40003405 is 50430004.

40003405 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 4 ways, for example, as 6791236 + 33212169 = 2606^2 + 5763^2 .

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 40003405 - 2²³ = 31614797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003409) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 307654 + ... + 307783.

It is an arithmetic number, because the mean of its divisors is an integer number (6462099).

Almost surely, 2^40003405 is an apocalyptic number.

It is an amenable number.

40003405 is a deficient number, since it is larger than the sum of its proper divisors (11693387).

40003405 is a wasteful number, since it uses less digits than its factorization.

40003405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615455.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 40003405 is about 6324.8245034941. The cubic root of 40003405 is about 342.0048931735.

Adding to 40003405 its reverse (50430004), we get a palindrome (90433409).

The spelling of 40003405 in words is "forty million, three thousand, four hundred five".