1998692 has 6 divisors (see below), whose sum is σ = 3497718. Its totient is φ = 999344.

The previous prime is 1998691. The next prime is 1998697. The reversal of 1998692 is 2968991.

It can be written as a sum of positive squares in only one way, i.e., 1503076 + 495616 = 1226^2 + 704^2 .

It is not an unprimeable number, because it can be changed into a prime (1998691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249833 + ... + 249840.

It is an arithmetic number, because the mean of its divisors is an integer number (582953).

2^1998692 is an apocalyptic number.

It is an amenable number.

1998692 is a deficient number, since it is larger than the sum of its proper divisors (1499026).

1998692 is a wasteful number, since it uses less digits than its factorization.

1998692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499677 (or 499675 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The square root of 1998692 is about 1413.7510389032. The cubic root of 1998692 is about 125.9646327208.

Subtracting 1998692 from its reverse (2968991), we obtain a cube (970299 = 99³).

The spelling of 1998692 in words is "one million, nine hundred ninety-eight thousand, six hundred ninety-two".