1968438686 has 8 divisors (see below), whose sum is σ = 2970339120. Its totient is φ = 978325648.

The previous prime is 1968438683. The next prime is 1968438697. The reversal of 1968438686 is 6868348691.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968438683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2946431 + ... + 2947098.

It is an arithmetic number, because the mean of its divisors is an integer number (371292390).

Almost surely, 2^1968438686 is an apocalyptic number.

1968438686 is a deficient number, since it is larger than the sum of its proper divisors (1001900434).

1968438686 is a wasteful number, since it uses less digits than its factorization.

1968438686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893698.

The product of its digits is 11943936, while the sum is 59.

The square root of 1968438686 is about 44367.0901231983. The cubic root of 1968438686 is about 1253.2584184669.

The spelling of 1968438686 in words is "one billion, nine hundred sixty-eight million, four hundred thirty-eight thousand, six hundred eighty-six".