1968889512 has 32 divisors (see below), whose sum is σ = 4923434880. Its totient is φ = 656135040.

The previous prime is 1968889501. The next prime is 1968889541. The reversal of 1968889512 is 2159888691.

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, 128113 + ... + 142655.

It is an arithmetic number, because the mean of its divisors is an integer number (153857340).

Almost surely, 2^1968889512 is an apocalyptic number.

1968889512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1968889512 is an abundant number, since it is smaller than the sum of its proper divisors (2954545368).

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

1968889512 is a wasteful number, since it uses less digits than its factorization.

1968889512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20193 (or 20189 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 57.

The square root of 1968889512 is about 44372.1704675352. The cubic root of 1968889512 is about 1253.3540879190.

The spelling of 1968889512 in words is "one billion, nine hundred sixty-eight million, eight hundred eighty-nine thousand, five hundred twelve".