3978395 has 4 divisors (see below), whose sum is σ = 4774080. Its totient is φ = 3182712.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978395 is 5938793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5938793 = 7 ⋅848399.

It is a cyclic number.

It is not a de Polignac number, because 3978395 - 2¹⁶ = 3912859 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 397835 + ... + 397844.

It is an arithmetic number, because the mean of its divisors is an integer number (1193520).

Almost surely, 2^3978395 is an apocalyptic number.

3978395 is a deficient number, since it is larger than the sum of its proper divisors (795685).

3978395 is an equidigital number, since it uses as much as digits as its factorization.

3978395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795684.

The product of its digits is 204120, while the sum is 44.

The square root of 3978395 is about 1994.5914368612. The cubic root of 3978395 is about 158.4537907601.

The spelling of 3978395 in words is "three million, nine hundred seventy-eight thousand, three hundred ninety-five".