387878904020 has 12 divisors (see below), whose sum is σ = 814545698484. Its totient is φ = 155151561600.

The previous prime is 387878904019. The next prime is 387878904043. The reversal of 387878904020 is 20409878783.

It can be written as a sum of positive squares in 2 ways, for example, as 40830668356 + 347048235664 = 202066^2 + 589108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9696972581 + ... + 9696972620.

It is an arithmetic number, because the mean of its divisors is an integer number (67878808207).

Almost surely, 2^387878904020 is an apocalyptic number.

It is an amenable number.

387878904020 is an abundant number, since it is smaller than the sum of its proper divisors (426666794464).

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

387878904020 is a wasteful number, since it uses less digits than its factorization.

387878904020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19393945210 (or 19393945208 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 387878904020 in words is "three hundred eighty-seven billion, eight hundred seventy-eight million, nine hundred four thousand, twenty".