1998776 has 16 divisors (see below), whose sum is σ = 4036200. Its totient is φ = 922464.

The previous prime is 1998761. The next prime is 1998793. The reversal of 1998776 is 6778991.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1998776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9506 + ... + 9713.

2^1998776 is an apocalyptic number.

It is an amenable number.

1998776 is an abundant number, since it is smaller than the sum of its proper divisors (2037424).

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

1998776 is a wasteful number, since it uses less digits than its factorization.

1998776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19238 (or 19234 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 1998776 is about 1413.7807467921. The cubic root of 1998776 is about 125.9663973550.

The spelling of 1998776 in words is "one million, nine hundred ninety-eight thousand, seven hundred seventy-six".