989636 has 6 divisors (see below), whose sum is σ = 1731870. Its totient is φ = 494816.

The previous prime is 989629. The next prime is 989641. The reversal of 989636 is 636989.

989636 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., 988036 + 1600 = 994^2 + 40^2 .

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 = 989593 and 989602.

It is an unprimeable number.

989636 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, 123701 + ... + 123708.

It is an arithmetic number, because the mean of its divisors is an integer number (288645).

2⁹⁸⁹⁶³⁶ is an apocalyptic number.

It is an amenable number.

989636 is a deficient number, since it is larger than the sum of its proper divisors (742234).

989636 is a wasteful number, since it uses less digits than its factorization.

989636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247413 (or 247411 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 989636 is about 994.8045034076. The cubic root of 989636 is about 99.6533329416.

The spelling of 989636 in words is "nine hundred eighty-nine thousand, six hundred thirty-six".