3978422 has 8 divisors (see below), whose sum is σ = 6820176. Its totient is φ = 1705032.

The previous prime is 3978421. The next prime is 3978431. The reversal of 3978422 is 2248793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3978422² = 31655683220168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978421) 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 in 3 ways as a sum of consecutive naturals, for example, 142073 + ... + 142100.

It is an arithmetic number, because the mean of its divisors is an integer number (852522).

Almost surely, 2^3978422 is an apocalyptic number.

3978422 is a deficient number, since it is larger than the sum of its proper divisors (2841754).

3978422 is a wasteful number, since it uses less digits than its factorization.

3978422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284182.

The product of its digits is 24192, while the sum is 35.

The square root of 3978422 is about 1994.5982051531. The cubic root of 3978422 is about 158.4541492164.

The spelling of 3978422 in words is "three million, nine hundred seventy-eight thousand, four hundred twenty-two".