9971888 has 20 divisors (see below), whose sum is σ = 19371528. Its totient is φ = 4972800.

The previous prime is 9971887. The next prime is 9971917. The reversal of 9971888 is 8881799.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9971881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8963 + ... + 10013.

Almost surely, 2^9971888 is an apocalyptic number.

It is an amenable number.

9971888 is a deficient number, since it is larger than the sum of its proper divisors (9399640).

9971888 is a wasteful number, since it uses less digits than its factorization.

9971888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1646 counting only the distinct ones).

The product of its digits is 290304, while the sum is 50.

The square root of 9971888 is about 3157.8296344167. The cubic root of 9971888 is about 215.2413946342.

The spelling of 9971888 in words is "nine million, nine hundred seventy-one thousand, eight hundred eighty-eight".