1998748 has 6 divisors (see below), whose sum is σ = 3497816. Its totient is φ = 999372.

The previous prime is 1998739. The next prime is 1998761. The reversal of 1998748 is 8478991.

It is a happy number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1998698 and 1998707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249840 + ... + 249847.

2^1998748 is an apocalyptic number.

It is an amenable number.

1998748 is a deficient number, since it is larger than the sum of its proper divisors (1499068).

1998748 is a wasteful number, since it uses less digits than its factorization.

1998748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499691 (or 499689 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 1998748 is about 1413.7708442318. The cubic root of 1998748 is about 125.9658091491.

The spelling of 1998748 in words is "one million, nine hundred ninety-eight thousand, seven hundred forty-eight".