40028789638 has 8 divisors (see below), whose sum is σ = 63203352120. Its totient is φ = 18961005600.

The previous prime is 40028789627. The next prime is 40028789743. The reversal of 40028789638 is 83698782004.

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

It is a congruent number.

It is an unprimeable number.

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, 526694563 + ... + 526694638.

It is an arithmetic number, because the mean of its divisors is an integer number (7900419015).

Almost surely, 2^40028789638 is an apocalyptic number.

40028789638 is a deficient number, since it is larger than the sum of its proper divisors (23174562482).

40028789638 is a wasteful number, since it uses less digits than its factorization.

40028789638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053389222.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 40028789638 in words is "forty billion, twenty-eight million, seven hundred eighty-nine thousand, six hundred thirty-eight".