1998824 has 8 divisors (see below), whose sum is σ = 3747810. Its totient is φ = 999408.

The previous prime is 1998817. The next prime is 1998827. The reversal of 1998824 is 4288991.

It can be written as a sum of positive squares in only one way, i.e., 1170724 + 828100 = 1082^2 + 910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (1998827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124919 + ... + 124934.

2^1998824 is an apocalyptic number.

It is an amenable number.

1998824 is a deficient number, since it is larger than the sum of its proper divisors (1748986).

1998824 is a wasteful number, since it uses less digits than its factorization.

1998824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249859 (or 249855 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 1998824 is about 1413.7977224483. The cubic root of 1998824 is about 125.9674056952.

The spelling of 1998824 in words is "one million, nine hundred ninety-eight thousand, eight hundred twenty-four".