1998562 has 12 divisors (see below), whose sum is σ = 3135510. Its totient is φ = 955328.

The previous prime is 1998559. The next prime is 1998569. The reversal of 1998562 is 2658991.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 279841 = 1311^2 + 529^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114 + ... + 2002.

2^1998562 is an apocalyptic number.

1998562 is a deficient number, since it is larger than the sum of its proper divisors (1136948).

1998562 is a wasteful number, since it uses less digits than its factorization.

1998562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937 (or 1914 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 1998562 is about 1413.7050611779. The cubic root of 1998562 is about 125.9619016418.

The spelling of 1998562 in words is "one million, nine hundred ninety-eight thousand, five hundred sixty-two".