998980 has 24 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 396000.

The previous prime is 998969. The next prime is 998983. The reversal of 998980 is 89899.

It is a super-2 number, since 2×998980² = 1995922080800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998983) by changing a digit.

998980 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 7 ways as a sum of consecutive naturals, for example, 3855 + ... + 4105.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2⁹⁹⁸⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

998980 is an abundant number, since it is smaller than the sum of its proper divisors (1117820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998980 is a wasteful number, since it uses less digits than its factorization.

998980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 998980 is about 999.4898698836. The cubic root of 998980 is about 99.9659884334.

It can be divided in two parts, 9 and 98980, that added together give a palindrome (98989).

The spelling of 998980 in words is "nine hundred ninety-eight thousand, nine hundred eighty".