40040039 has 8 divisors (see below), whose sum is σ = 44607360. Its totient is φ = 35685216.

The previous prime is 40040029. The next prime is 40040041. The reversal of 40040039 is 93004004.

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 40040039 - 2²⁴ = 23262823 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 40040039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52727 + ... + 53480.

It is an arithmetic number, because the mean of its divisors is an integer number (5575920).

Almost surely, 2^40040039 is an apocalyptic number.

40040039 is a deficient number, since it is larger than the sum of its proper divisors (4567321).

40040039 is a wasteful number, since it uses less digits than its factorization.

40040039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106249.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40040039 is about 6327.7198895021. The cubic root of 40040039 is about 342.1092608278.

The spelling of 40040039 in words is "forty million, forty thousand, thirty-nine".