1968667408 has 20 divisors (see below), whose sum is σ = 3823115548. Its totient is φ = 982056960.

The previous prime is 1968667403. The next prime is 1968667433. The reversal of 1968667408 is 8047668691.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 257025024 + 1711642384 = 16032^2 + 41372^2 .

It is not an unprimeable number, because it can be changed into a prime (1968667403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 135153 + ... + 149008.

Almost surely, 2^1968667408 is an apocalyptic number.

It is an amenable number.

1968667408 is a deficient number, since it is larger than the sum of its proper divisors (1854448140).

1968667408 is a wasteful number, since it uses less digits than its factorization.

1968667408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284602 (or 284596 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 1968667408 is about 44369.6676570830. The cubic root of 1968667408 is about 1253.3069572187.

The spelling of 1968667408 in words is "one billion, nine hundred sixty-eight million, six hundred sixty-seven thousand, four hundred eight".