40004138 has 8 divisors (see below), whose sum is σ = 60103200. Its totient is φ = 19969740.

The previous prime is 40004131. The next prime is 40004143. The reversal of 40004138 is 83140004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40004131) 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, 14588 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (7512900).

Almost surely, 2^40004138 is an apocalyptic number.

40004138 is a deficient number, since it is larger than the sum of its proper divisors (20099062).

40004138 is a wasteful number, since it uses less digits than its factorization.

40004138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32332.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40004138 is about 6324.8824495005. The cubic root of 40004138 is about 342.0069820628.

The spelling of 40004138 in words is "forty million, four thousand, one hundred thirty-eight".