8781632 has 28 divisors (see below), whose sum is σ = 17836896. Its totient is φ = 4287360.

The previous prime is 8781631. The next prime is 8781637. The reversal of 8781632 is 2361878.

8781632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 8781592 and 8781601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8781631) 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, 1157 + ... + 4347.

It is an arithmetic number, because the mean of its divisors is an integer number (637032).

Almost surely, 2^8781632 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 8781632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8918448).

8781632 is an abundant number, since it is smaller than the sum of its proper divisors (9055264).

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

8781632 is a wasteful number, since it uses less digits than its factorization.

8781632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246 (or 3236 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 8781632 is about 2963.3818518713. The cubic root of 8781632 is about 206.3122796922.

The spelling of 8781632 in words is "eight million, seven hundred eighty-one thousand, six hundred thirty-two".