1968131964 has 24 divisors (see below), whose sum is σ = 4598007120. Its totient is φ = 655229824.

The previous prime is 1968131959. The next prime is 1968131981. The reversal of 1968131964 is 4691318691.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91659 + ... + 111074.

It is an arithmetic number, because the mean of its divisors is an integer number (191583630).

Almost surely, 2^1968131964 is an apocalyptic number.

It is an amenable number.

1968131964 is an abundant number, since it is smaller than the sum of its proper divisors (2629875156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1968131964 is a wasteful number, since it uses less digits than its factorization.

1968131964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203549 (or 203547 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 1968131964 is about 44363.6333498509. The cubic root of 1968131964 is about 1253.1933208680.

The spelling of 1968131964 in words is "one billion, nine hundred sixty-eight million, one hundred thirty-one thousand, nine hundred sixty-four".