196443866 has 32 divisors (see below), whose sum is σ = 309923328. Its totient is φ = 93305520.

The previous prime is 196443859. The next prime is 196443881. The reversal of 196443866 is 668344691.

It is a self number, because there is not a number n which added to its sum of digits gives 196443866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593321 + ... + 593651.

It is an arithmetic number, because the mean of its divisors is an integer number (9685104).

Almost surely, 2^196443866 is an apocalyptic number.

196443866 is a deficient number, since it is larger than the sum of its proper divisors (113479462).

196443866 is a wasteful number, since it uses less digits than its factorization.

196443866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its digits is 746496, while the sum is 47.

The square root of 196443866 is about 14015.8433923899. The cubic root of 196443866 is about 581.3167329864.

The spelling of 196443866 in words is "one hundred ninety-six million, four hundred forty-three thousand, eight hundred sixty-six".