998440211 has 4 divisors (see below), whose sum is σ = 1006062024. Its totient is φ = 990818400.

The previous prime is 998440207. The next prime is 998440259. The reversal of 998440211 is 112044899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998440211 - 2² = 998440207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998440271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3810710 + ... + 3810971.

It is an arithmetic number, because the mean of its divisors is an integer number (251515506).

Almost surely, 2^998440211 is an apocalyptic number.

998440211 is a deficient number, since it is larger than the sum of its proper divisors (7621813).

998440211 is a wasteful number, since it uses less digits than its factorization.

998440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621812.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 998440211 is about 31598.1045475832. The cubic root of 998440211 is about 999.4797997720.

The spelling of 998440211 in words is "nine hundred ninety-eight million, four hundred forty thousand, two hundred eleven".