40336405 has 4 divisors (see below), whose sum is σ = 48403692. Its totient is φ = 32269120.

The previous prime is 40336379. The next prime is 40336409. The reversal of 40336405 is 50463304.

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 31798321 + 8538084 = 5639^2 + 2922^2 .

It is not a de Polignac number, because 40336405 - 2⁷ = 40336277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40336405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40336409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4033636 + ... + 4033645.

It is an arithmetic number, because the mean of its divisors is an integer number (12100923).

Almost surely, 2^40336405 is an apocalyptic number.

It is an amenable number.

40336405 is a deficient number, since it is larger than the sum of its proper divisors (8067287).

40336405 is an equidigital number, since it uses as much as digits as its factorization.

40336405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8067286.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 40336405 is about 6351.0947875150. The cubic root of 40336405 is about 342.9512548771.

Adding to 40336405 its reverse (50463304), we get a palindrome (90799709).

The spelling of 40336405 in words is "forty million, three hundred thirty-six thousand, four hundred five".