39649393838 has 16 divisors (see below), whose sum is σ = 62608911120. Its totient is φ = 18779910336.

The previous prime is 39649393807. The next prime is 39649393841. The reversal of 39649393838 is 83839394693.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641420 + ... + 700512.

It is an arithmetic number, because the mean of its divisors is an integer number (3913056945).

Almost surely, 2^39649393838 is an apocalyptic number.

39649393838 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

39649393838 is a deficient number, since it is larger than the sum of its proper divisors (22959517282).

39649393838 is a wasteful number, since it uses less digits than its factorization.

39649393838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76771.

The product of its digits is 90699264, while the sum is 65.

The spelling of 39649393838 in words is "thirty-nine billion, six hundred forty-nine million, three hundred ninety-three thousand, eight hundred thirty-eight".