1998046 has 4 divisors (see below), whose sum is σ = 2997072. Its totient is φ = 999022.

The previous prime is 1998041. The next prime is 1998049. The reversal of 1998046 is 6408991.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1997996 and 1998014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499510 + ... + 499513.

It is an arithmetic number, because the mean of its divisors is an integer number (749268).

2^1998046 is an apocalyptic number.

1998046 is a deficient number, since it is larger than the sum of its proper divisors (999026).

1998046 is an equidigital number, since it uses as much as digits as its factorization.

1998046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999025.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1998046 is about 1413.5225502269. The cubic root of 1998046 is about 125.9510601908.

The spelling of 1998046 in words is "one million, nine hundred ninety-eight thousand, forty-six".