40320005 has 32 divisors (see below), whose sum is σ = 57853440. Its totient is φ = 26629120.

The previous prime is 40320001. The next prime is 40320011. The reversal of 40320005 is 50002304.

It is not a de Polignac number, because 40320005 - 2² = 40320001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40320001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26372 + ... + 27858.

It is an arithmetic number, because the mean of its divisors is an integer number (1807920).

Almost surely, 2^40320005 is an apocalyptic number.

It is an amenable number.

40320005 is a deficient number, since it is larger than the sum of its proper divisors (17533435).

40320005 is a wasteful number, since it uses less digits than its factorization.

40320005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 40320005 is about 6349.8035402680. The cubic root of 40320005 is about 342.9047694668.

Adding to 40320005 its reverse (50002304), we get a palindrome (90322309).

The spelling of 40320005 in words is "forty million, three hundred twenty thousand, five".