3968218586 has 4 divisors (see below), whose sum is σ = 5952327882. Its totient is φ = 1984109292.

The previous prime is 3968218561. The next prime is 3968218621. The reversal of 3968218586 is 6858128693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6858128693 = 13 ⋅527548361.

It can be written as a sum of positive squares in only one way, i.e., 2833539361 + 1134679225 = 53231^2 + 33685^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992054645 + ... + 992054648.

Almost surely, 2^3968218586 is an apocalyptic number.

3968218586 is a deficient number, since it is larger than the sum of its proper divisors (1984109296).

3968218586 is a wasteful number, since it uses less digits than its factorization.

3968218586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984109295.

The product of its digits is 4976640, while the sum is 56.

The square root of 3968218586 is about 62993.7979963107. The cubic root of 3968218586 is about 1583.1857138927.

The spelling of 3968218586 in words is "three billion, nine hundred sixty-eight million, two hundred eighteen thousand, five hundred eighty-six".