1998411 has 8 divisors (see below), whose sum is σ = 2671104. Its totient is φ = 1329000.

The previous prime is 1998397. The next prime is 1998413. The reversal of 1998411 is 1148991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1998411 - 2⁵ = 1998379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1998413) 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, 1810 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (333888).

2^1998411 is an apocalyptic number.

1998411 is a deficient number, since it is larger than the sum of its proper divisors (672693).

1998411 is an equidigital number, since it uses as much as digits as its factorization.

1998411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its digits is 2592, while the sum is 33.

The square root of 1998411 is about 1413.6516544043. The cubic root of 1998411 is about 125.9587292398.

The spelling of 1998411 in words is "one million, nine hundred ninety-eight thousand, four hundred eleven".