1968632688 has 40 divisors (see below), whose sum is σ = 5547966336. Its totient is φ = 596555200.

The previous prime is 1968632681. The next prime is 1968632737. The reversal of 1968632688 is 8862368691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968632681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863708 + ... + 1864763.

Almost surely, 2^1968632688 is an apocalyptic number.

It is an amenable number.

1968632688 is an abundant number, since it is smaller than the sum of its proper divisors (3579333648).

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

1968632688 is a wasteful number, since it uses less digits than its factorization.

1968632688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728493 (or 3728487 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The square root of 1968632688 is about 44369.2763970746. The cubic root of 1968632688 is about 1253.2995892781.

The spelling of 1968632688 in words is "one billion, nine hundred sixty-eight million, six hundred thirty-two thousand, six hundred eighty-eight".