998812818 has 48 divisors (see below), whose sum is σ = 2210304096. Its totient is φ = 325892160.

The previous prime is 998812813. The next prime is 998812831. The reversal of 998812818 is 818218899.

It is a super-2 number, since 2×998812818² = 1995254090802202248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998812811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194038 + ... + 199118.

It is an arithmetic number, because the mean of its divisors is an integer number (46048002).

Almost surely, 2^998812818 is an apocalyptic number.

998812818 is an abundant number, since it is smaller than the sum of its proper divisors (1211491278).

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

998812818 is a wasteful number, since it uses less digits than its factorization.

998812818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319 (or 5316 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The square root of 998812818 is about 31604.0000316416. Note that the first 4 decimals coincide. The cubic root of 998812818 is about 999.6041159632.

The spelling of 998812818 in words is "nine hundred ninety-eight million, eight hundred twelve thousand, eight hundred eighteen".