1971789888 has 28 divisors (see below), whose sum is σ = 5217027920. Its totient is φ = 657263232.

The previous prime is 1971789881. The next prime is 1971789889. The reversal of 1971789888 is 8889871791.

It is not an unprimeable number, because it can be changed into a prime (1971789881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5134678 + ... + 5135061.

Almost surely, 2^1971789888 is an apocalyptic number.

It is an amenable number.

1971789888 is an abundant number, since it is smaller than the sum of its proper divisors (3245238032).

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

1971789888 is a wasteful number, since it uses less digits than its factorization.

1971789888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269754 (or 10269744 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 66.

The square root of 1971789888 is about 44404.8408171902. The cubic root of 1971789888 is about 1253.9692256310.

The spelling of 1971789888 in words is "one billion, nine hundred seventy-one million, seven hundred eighty-nine thousand, eight hundred eighty-eight".