3988039840 has 24 divisors (see below), whose sum is σ = 9421744500. Its totient is φ = 1595215872.

The previous prime is 3988039837. The next prime is 3988039879. The reversal of 3988039840 is 489308893.

It can be written as a sum of positive squares in 2 ways, for example, as 3879296656 + 108743184 = 62284^2 + 10428^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

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, 12462465 + ... + 12462784.

Almost surely, 2^3988039840 is an apocalyptic number.

It is an amenable number.

3988039840 is an abundant number, since it is smaller than the sum of its proper divisors (5433704660).

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

3988039840 is a wasteful number, since it uses less digits than its factorization.

3988039840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24925264 (or 24925256 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 3988039840 is about 63150.9290509649. The cubic root of 3988039840 is about 1585.8173415849.

The spelling of 3988039840 in words is "three billion, nine hundred eighty-eight million, thirty-nine thousand, eight hundred forty".