39938848664 has 64 divisors (see below), whose sum is σ = 89419589280. Its totient is φ = 16482816000.

The previous prime is 39938848643. The next prime is 39938848679. The reversal of 39938848664 is 46684883993.

39938848664 = 16641² + 16642² + ... + 16783².

It is a super-2 number, since 2×39938848664² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39938848594 and 39938848603.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 216377 + ... + 355944.

Almost surely, 2^39938848664 is an apocalyptic number.

It is an amenable number.

39938848664 is an abundant number, since it is smaller than the sum of its proper divisors (49480740616).

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

39938848664 is a wasteful number, since it uses less digits than its factorization.

39938848664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572412 (or 572408 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 68.

The spelling of 39938848664 in words is "thirty-nine billion, nine hundred thirty-eight million, eight hundred forty-eight thousand, six hundred sixty-four".