3988780967889 has 24 divisors (see below), whose sum is σ = 5787708930432. Its totient is φ = 2647140899040.

The previous prime is 3988780967881. The next prime is 3988780967957. The reversal of 3988780967889 is 9887690878893.

3988780967889 is a `hidden beast` number, since 398 + 8 + 7 + 80 + 9 + 67 + 8 + 89 = 666.

It is not a de Polignac number, because 3988780967889 - 2³ = 3988780967881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3988780967799 and 3988780967808.

It is not an unprimeable number, because it can be changed into a prime (3988780967881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2206207 + ... + 3583979.

It is an arithmetic number, because the mean of its divisors is an integer number (241154538768).

Almost surely, 2^{3988780967889} is an apocalyptic number.

It is an amenable number.

3988780967889 is a deficient number, since it is larger than the sum of its proper divisors (1798927962543).

3988780967889 is a wasteful number, since it uses less digits than its factorization.

3988780967889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379237 (or 1379234 counting only the distinct ones).

The product of its (nonzero) digits is 21069103104, while the sum is 90.

The spelling of 3988780967889 in words is "three trillion, nine hundred eighty-eight billion, seven hundred eighty million, nine hundred sixty-seven thousand, eight hundred eighty-nine".