40138904039 has 4 divisors (see below), whose sum is σ = 43226512056. Its totient is φ = 37051296024.

The previous prime is 40138904011. The next prime is 40138904083. The reversal of 40138904039 is 93040983104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40138904039 - 2²⁰ = 40137855463 is a prime.

It is a super-2 number, since 2×40138904039² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40138903987 and 40138904005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138904339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543803989 + ... + 1543804014.

It is an arithmetic number, because the mean of its divisors is an integer number (10806628014).

Almost surely, 2^40138904039 is an apocalyptic number.

40138904039 is a deficient number, since it is larger than the sum of its proper divisors (3087608017).

40138904039 is a wasteful number, since it uses less digits than its factorization.

40138904039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087608016.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 40138904039 in words is "forty billion, one hundred thirty-eight million, nine hundred four thousand, thirty-nine".