998845 has 8 divisors (see below), whose sum is σ = 1210464. Its totient is φ = 791184.

The previous prime is 998843. The next prime is 998857. The reversal of 998845 is 548899.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 998845 - 2¹ = 998843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (151308).

2⁹⁹⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

998845 is a deficient number, since it is larger than the sum of its proper divisors (211619).

998845 is a wasteful number, since it uses less digits than its factorization.

998845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its digits is 103680, while the sum is 43.

The square root of 998845 is about 999.4223331505. The cubic root of 998845 is about 99.9614851680.

The spelling of 998845 in words is "nine hundred ninety-eight thousand, eight hundred forty-five".