989810 has 8 divisors (see below), whose sum is σ = 1781676. Its totient is φ = 395920.

The previous prime is 989803. The next prime is 989827. The reversal of 989810 is 18989.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 885481 + 104329 = 941^2 + 323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×989810² = 1959447672200, which contains 22 as substring.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989810.

It is an unprimeable number.

989810 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49481 + ... + 49500.

2⁹⁸⁹⁸¹⁰ is an apocalyptic number.

989810 is a deficient number, since it is larger than the sum of its proper divisors (791866).

989810 is a wasteful number, since it uses less digits than its factorization.

989810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98988.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 989810 is about 994.8919539327. The cubic root of 989810 is about 99.6591730228.

The spelling of 989810 in words is "nine hundred eighty-nine thousand, eight hundred ten".