3978927 has 18 divisors (see below), whose sum is σ = 5913336. Its totient is φ = 2578080.

The previous prime is 3978917. The next prime is 3978967. The reversal of 3978927 is 7298793.

It is not a de Polignac number, because 3978927 - 2⁸ = 3978671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978917) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14998 + ... + 15260.

Almost surely, 2^3978927 is an apocalyptic number.

3978927 is a deficient number, since it is larger than the sum of its proper divisors (1934409).

3978927 is a wasteful number, since it uses less digits than its factorization.

3978927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 307 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 3978927 is about 1994.7247930479. The cubic root of 3978927 is about 158.4608533787.

The spelling of 3978927 in words is "three million, nine hundred seventy-eight thousand, nine hundred twenty-seven".