9781632 has 96 divisors (see below), whose sum is σ = 32195280. Its totient is φ = 2792448.

The previous prime is 9781631. The next prime is 9781643. The reversal of 9781632 is 2361879.

9781632 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9781631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7458 + ... + 8670.

Almost surely, 2^9781632 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 9781632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16097640).

9781632 is an abundant number, since it is smaller than the sum of its proper divisors (22413648).

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

9781632 is a wasteful number, since it uses less digits than its factorization.

9781632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240 (or 1225 counting only the distinct ones).

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

The square root of 9781632 is about 3127.5600713655. The cubic root of 9781632 is about 213.8637150136.

The spelling of 9781632 in words is "nine million, seven hundred eighty-one thousand, six hundred thirty-two".