40320004 has 12 divisors (see below), whose sum is σ = 70830144. Its totient is φ = 20082824.

The previous prime is 40320001. The next prime is 40320011. The reversal of 40320004 is 40002304.

40320004 = T₄₁₇ + T₄₁₈ + ... + T₆₇₉.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18112 + ... + 20215.

It is an arithmetic number, because the mean of its divisors is an integer number (5902512).

Almost surely, 2^40320004 is an apocalyptic number.

It is an amenable number.

40320004 is a deficient number, since it is larger than the sum of its proper divisors (30510140).

40320004 is a wasteful number, since it uses less digits than its factorization.

40320004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38594 (or 38592 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40320004 is about 6349.8034615254. The cubic root of 40320004 is about 342.9047666320.

Adding to 40320004 its reverse (40002304), we get a palindrome (80322308).

The spelling of 40320004 in words is "forty million, three hundred twenty thousand, four".