1998912 has 56 divisors (see below), whose sum is σ = 5486400. Its totient is φ = 641536.

The previous prime is 1998881. The next prime is 1998917. The reversal of 1998912 is 2198991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1998917) 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, 5389 + ... + 5747.

2^1998912 is an apocalyptic number.

1998912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2743200).

1998912 is an abundant number, since it is smaller than the sum of its proper divisors (3487488).

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

1998912 is a wasteful number, since it uses less digits than its factorization.

1998912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 393 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The square root of 1998912 is about 1413.8288439553. The cubic root of 1998912 is about 125.9692542770.

The spelling of 1998912 in words is "one million, nine hundred ninety-eight thousand, nine hundred twelve".