387878904040 has 128 divisors (see below), whose sum is σ = 973204502400. Its totient is φ = 138267648000.

The previous prime is 387878904019. The next prime is 387878904043. The reversal of 387878904040 is 40409878783.

It is not an unprimeable number, because it can be changed into a prime (387878904043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29076252 + ... + 29089588.

It is an arithmetic number, because the mean of its divisors is an integer number (7603160175).

Almost surely, 2^387878904040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387878904040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486602251200).

387878904040 is an abundant number, since it is smaller than the sum of its proper divisors (585325598360).

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

387878904040 is a wasteful number, since it uses less digits than its factorization.

387878904040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15635 (or 15631 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 387878904040 in words is "three hundred eighty-seven billion, eight hundred seventy-eight million, nine hundred four thousand, forty".