1998936 has 24 divisors (see below), whose sum is σ = 5413980. Its totient is φ = 666288.

The previous prime is 1998923. The next prime is 1998943. The reversal of 1998936 is 6398991.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1998891 and 1998900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13810 + ... + 13953.

2^1998936 is an apocalyptic number.

It is an amenable number.

1998936 is an abundant number, since it is smaller than the sum of its proper divisors (3415044).

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

1998936 is a wasteful number, since it uses less digits than its factorization.

1998936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27775 (or 27768 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1998936 is about 1413.8373315201. The cubic root of 1998936 is about 125.9697584263.

The spelling of 1998936 in words is "one million, nine hundred ninety-eight thousand, nine hundred thirty-six".