3988312671978 has 24 divisors (see below), whose sum is σ = 9096151708800. Its totient is φ = 1259467159464.

The previous prime is 3988312671929. The next prime is 3988312672049. The reversal of 3988312671978 is 8791762138893.

3988312671978 is a `hidden beast` number, since 398 + 83 + 1 + 2 + 6 + 71 + 97 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5830866138 + ... + 5830866821.

It is an arithmetic number, because the mean of its divisors is an integer number (379006321200).

Almost surely, 2^{3988312671978} is an apocalyptic number.

3988312671978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3988312671978 is an abundant number, since it is smaller than the sum of its proper divisors (5107839036822).

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

3988312671978 is a wasteful number, since it uses less digits than its factorization.

3988312671978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11661732986 (or 11661732983 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The spelling of 3988312671978 in words is "three trillion, nine hundred eighty-eight billion, three hundred twelve million, six hundred seventy-one thousand, nine hundred seventy-eight".