39989370990808 has 8 divisors (see below), whose sum is σ = 74980070607780. Its totient is φ = 19994685495400.

The previous prime is 39989370990787. The next prime is 39989370990839. The reversal of 39989370990808 is 80809907398993.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×39989370990808³ (a number of 42 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 2499335686918 + ... + 2499335686933.

Almost surely, 2^{39989370990808} is an apocalyptic number.

It is an amenable number.

39989370990808 is a deficient number, since it is larger than the sum of its proper divisors (34990699616972).

39989370990808 is a wasteful number, since it uses less digits than its factorization.

39989370990808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998671373857 (or 4998671373853 counting only the distinct ones).

The product of its (nonzero) digits is 1904684544, while the sum is 82.

The spelling of 39989370990808 in words is "thirty-nine trillion, nine hundred eighty-nine billion, three hundred seventy million, nine hundred ninety thousand, eight hundred eight".