1998441 has 12 divisors (see below), whose sum is σ = 2902068. Its totient is φ = 1325184.

The previous prime is 1998431. The next prime is 1998443. The reversal of 1998441 is 1448991.

It can be written as a sum of positive squares in 2 ways, for example, as 608400 + 1390041 = 780^2 + 1179^2 .

It is not a de Polignac number, because 1998441 - 2¹³ = 1990249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1998396 and 1998405.

It is not an unprimeable number, because it can be changed into a prime (1998443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1621 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (241839).

2^1998441 is an apocalyptic number.

It is an amenable number.

1998441 is a deficient number, since it is larger than the sum of its proper divisors (903627).

1998441 is a wasteful number, since it uses less digits than its factorization.

1998441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1189 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1998441 is about 1413.6622651822. The cubic root of 1998441 is about 125.9593595310.

The spelling of 1998441 in words is "one million, nine hundred ninety-eight thousand, four hundred forty-one".