3969988 has 12 divisors (see below), whose sum is σ = 7579152. Its totient is φ = 1804520.

The previous prime is 3969983. The next prime is 3969997. The reversal of 3969988 is 8899693.

3969988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3969983) by changing a digit.

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, 45070 + ... + 45157.

It is an arithmetic number, because the mean of its divisors is an integer number (631596).

Almost surely, 2^3969988 is an apocalyptic number.

It is an amenable number.

3969988 is a deficient number, since it is larger than the sum of its proper divisors (3609164).

3969988 is a wasteful number, since it uses less digits than its factorization.

3969988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90242 (or 90240 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 3969988 is about 1992.4828732012. The cubic root of 3969988 is about 158.3420991146.

The spelling of 3969988 in words is "three million, nine hundred sixty-nine thousand, nine hundred eighty-eight".