981632 has 16 divisors (see below), whose sum is σ = 1955850. Its totient is φ = 490752.

The previous prime is 981623. The next prime is 981637. The reversal of 981632 is 236189.

981632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 602176 + 379456 = 776^2 + 616^2 .

It is a tau number, because it is divible by the number of its divisors (16).

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

It is a junction number, because it is equal to n+sod(n) for n = 981595 and 981604.

It is not an unprimeable number, because it can be changed into a prime (981637) by changing a digit.

981632 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3707 + ... + 3962.

2⁹⁸¹⁶³² is an apocalyptic number.

It is an amenable number.

981632 is a deficient number, since it is larger than the sum of its proper divisors (974218).

981632 is an equidigital number, since it uses as much as digits as its factorization.

981632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7683 (or 7671 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 981632 is about 990.7734352515. The cubic root of 981632 is about 99.3839459003.

The spelling of 981632 in words is "nine hundred eighty-one thousand, six hundred thirty-two".