39689947938 has 16 divisors (see below), whose sum is σ = 80725318560. Its totient is φ = 13005745536.

The previous prime is 39689947877. The next prime is 39689948029. The reversal of 39689947938 is 83974998693.

It is a self number, because there is not a number n which added to its sum of digits gives 39689947938.

It is an unprimeable number.

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, 56058895 + ... + 56059602.

It is an arithmetic number, because the mean of its divisors is an integer number (5045332410).

Almost surely, 2^39689947938 is an apocalyptic number.

39689947938 is an abundant number, since it is smaller than the sum of its proper divisors (41035370622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39689947938 is a wasteful number, since it uses less digits than its factorization.

39689947938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112118561.

The product of its digits is 634894848, while the sum is 75.

The spelling of 39689947938 in words is "thirty-nine billion, six hundred eighty-nine million, nine hundred forty-seven thousand, nine hundred thirty-eight".