3988520 has 16 divisors (see below), whose sum is σ = 8974260. Its totient is φ = 1595392.

The previous prime is 3988519. The next prime is 3988531. The reversal of 3988520 is 258893.

3988520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3771364 + 217156 = 1942^2 + 466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49817 + ... + 49896.

Almost surely, 2^3988520 is an apocalyptic number.

It is an amenable number.

3988520 is an abundant number, since it is smaller than the sum of its proper divisors (4985740).

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

3988520 is a wasteful number, since it uses less digits than its factorization.

3988520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99724 (or 99720 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 3988520 is about 1997.1279378147. The cubic root of 3988520 is about 158.5880983167.

The spelling of 3988520 in words is "three million, nine hundred eighty-eight thousand, five hundred twenty".