3978922 has 8 divisors (see below), whose sum is σ = 6081156. Its totient is φ = 1951872.

The previous prime is 3978917. The next prime is 3978967. The reversal of 3978922 is 2298793.

It can be written as a sum of positive squares in 2 ways, for example, as 3956121 + 22801 = 1989^2 + 151^2 .

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

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, 18663 + ... + 18874.

Almost surely, 2^3978922 is an apocalyptic number.

3978922 is a deficient number, since it is larger than the sum of its proper divisors (2102234).

3978922 is a wasteful number, since it uses less digits than its factorization.

3978922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37592.

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

The square root of 3978922 is about 1994.7235397418. The cubic root of 3978922 is about 158.4607870036.

It can be divided in two parts, 3978 and 922, that added together give a square (4900 = 70²).

The spelling of 3978922 in words is "three million, nine hundred seventy-eight thousand, nine hundred twenty-two".