998812 has 6 divisors (see below), whose sum is σ = 1747928. Its totient is φ = 499404.

The previous prime is 998779. The next prime is 998813. The reversal of 998812 is 218899.

It is a super-2 number, since 2×998812² = 1995250822688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124848 + ... + 124855.

2⁹⁹⁸⁸¹² is an apocalyptic number.

It is an amenable number.

998812 is a deficient number, since it is larger than the sum of its proper divisors (749116).

998812 is a wasteful number, since it uses less digits than its factorization.

998812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249707 (or 249705 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 998812 is about 999.4058234771. The cubic root of 998812 is about 99.9603843080.

It can be divided in two parts, 9988 and 12, that added together give a 4-th power (10000 = 10⁴).

The spelling of 998812 in words is "nine hundred ninety-eight thousand, eight hundred twelve".