9871632 has 60 divisors (see below), whose sum is σ = 28661360. Its totient is φ = 3289248.

The previous prime is 9871619. The next prime is 9871633. The reversal of 9871632 is 2361789.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (9871633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2619 + ... + 5157.

Almost surely, 2^9871632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9871632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14330680).

9871632 is an abundant number, since it is smaller than the sum of its proper divisors (18789728).

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

9871632 is a wasteful number, since it uses less digits than its factorization.

9871632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 2544 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 9871632 is about 3141.9153394068. The cubic root of 9871632 is about 214.5176277752.

The spelling of 9871632 in words is "nine million, eight hundred seventy-one thousand, six hundred thirty-two".