1998768 has 20 divisors (see below), whose sum is σ = 5163608. Its totient is φ = 666240.

The previous prime is 1998761. The next prime is 1998793. The reversal of 1998768 is 8678991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 41641 = 1998768 / (1 + 9 + 9 + 8 + 7 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (1998761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20773 + ... + 20868.

2^1998768 is an apocalyptic number.

It is an amenable number.

1998768 is an abundant number, since it is smaller than the sum of its proper divisors (3164840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998768 is a wasteful number, since it uses less digits than its factorization.

1998768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41652 (or 41646 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 1998768 is about 1413.7779174962. Note that the first 3 decimals coincide. The cubic root of 1998768 is about 125.9662292967.

The spelling of 1998768 in words is "one million, nine hundred ninety-eight thousand, seven hundred sixty-eight".