3988780967888 has 20 divisors (see below), whose sum is σ = 7937135102820. Its totient is φ = 1940488038144.

The previous prime is 3988780967881. The next prime is 3988780967957. The reversal of 3988780967888 is 8887690878893.

It can be written as a sum of positive squares in 2 ways, for example, as 2788459137424 + 1200321830464 = 1669868^2 + 1095592^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3368902253 + ... + 3368903436.

It is an arithmetic number, because the mean of its divisors is an integer number (396856755141).

Almost surely, 2^{3988780967888} is an apocalyptic number.

It is an amenable number.

3988780967888 is a deficient number, since it is larger than the sum of its proper divisors (3948354134932).

3988780967888 is a wasteful number, since it uses less digits than its factorization.

3988780967888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737805734 (or 6737805728 counting only the distinct ones).

The product of its (nonzero) digits is 18728091648, while the sum is 89.

The spelling of 3988780967888 in words is "three trillion, nine hundred eighty-eight billion, seven hundred eighty million, nine hundred sixty-seven thousand, eight hundred eighty-eight".