3978904 has 16 divisors (see below), whose sum is σ = 7853400. Its totient is φ = 1884672.

The previous prime is 3978899. The next prime is 3978917. The reversal of 3978904 is 4098793.

It is an Ulam number.

It is a congruent number.

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, 12937 + ... + 13240.

Almost surely, 2^3978904 is an apocalyptic number.

It is an amenable number.

3978904 is a deficient number, since it is larger than the sum of its proper divisors (3874496).

3978904 is a wasteful number, since it uses less digits than its factorization.

3978904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26202 (or 26198 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 3978904 is about 1994.7190278332. The cubic root of 3978904 is about 158.4605480529.

The spelling of 3978904 in words is "three million, nine hundred seventy-eight thousand, nine hundred four".