3920986 has 4 divisors (see below), whose sum is σ = 5881482. Its totient is φ = 1960492.

The previous prime is 3920981. The next prime is 3920989. The reversal of 3920986 is 6890293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 516961 = 1845^2 + 719^2 .

It is not an unprimeable number, because it can be changed into a prime (3920981) 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 as a sum of consecutive naturals, namely, 980245 + ... + 980248.

Almost surely, 2^3920986 is an apocalyptic number.

3920986 is a deficient number, since it is larger than the sum of its proper divisors (1960496).

3920986 is a wasteful number, since it uses less digits than its factorization.

3920986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960495.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 3920986 is about 1980.1479742686. The cubic root of 3920986 is about 157.6879221587.

It can be divided in two parts, 39 and 20986, that added together give a square (21025 = 145²).

The spelling of 3920986 in words is "three million, nine hundred twenty thousand, nine hundred eighty-six".