40003917638 has 16 divisors (see below), whose sum is σ = 61471173456. Its totient is φ = 19514584320.

The previous prime is 40003917637. The next prime is 40003917643. The reversal of 40003917638 is 83671930004.

It is a junction number, because it is equal to n+sod(n) for n = 40003917595 and 40003917604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003917637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188231 + ... + 339762.

It is an arithmetic number, because the mean of its divisors is an integer number (3841948341).

Almost surely, 2^40003917638 is an apocalyptic number.

40003917638 is a deficient number, since it is larger than the sum of its proper divisors (21467255818).

40003917638 is a wasteful number, since it uses less digits than its factorization.

40003917638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528919.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 40003917638 in words is "forty billion, three million, nine hundred seventeen thousand, six hundred thirty-eight".