3988904 has 8 divisors (see below), whose sum is σ = 7479210. Its totient is φ = 1994448.

The previous prime is 3988903. The next prime is 3988909. The reversal of 3988904 is 4098893.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 996004 = 1730^2 + 998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3988904² = 31822710242432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3988903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249299 + ... + 249314.

Almost surely, 2^3988904 is an apocalyptic number.

It is an amenable number.

3988904 is a deficient number, since it is larger than the sum of its proper divisors (3490306).

3988904 is a wasteful number, since it uses less digits than its factorization.

3988904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498619 (or 498615 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 3988904 is about 1997.2240735581. The cubic root of 3988904 is about 158.5931875792.

The spelling of 3988904 in words is "three million, nine hundred eighty-eight thousand, nine hundred four".