39928744189 has 4 divisors (see below), whose sum is σ = 39929378656. Its totient is φ = 39928109724.

The previous prime is 39928744187. The next prime is 39928744199. The reversal of 39928744189 is 98144782993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39928744189 - 2¹ = 39928744187 is a prime.

It is a super-2 number, since 2×39928744189² (a number of 22 digits) contains 22 as substring.

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 39928744189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39928744183) 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, 210969 + ... + 352654.

It is an arithmetic number, because the mean of its divisors is an integer number (9982344664).

Almost surely, 2^39928744189 is an apocalyptic number.

It is an amenable number.

39928744189 is a deficient number, since it is larger than the sum of its proper divisors (634467).

39928744189 is an equidigital number, since it uses as much as digits as its factorization.

39928744189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634466.

The product of its digits is 31352832, while the sum is 64.

The spelling of 39928744189 in words is "thirty-nine billion, nine hundred twenty-eight million, seven hundred forty-four thousand, one hundred eighty-nine".