998940 has 24 divisors (see below), whose sum is σ = 2797200. Its totient is φ = 266368.

The previous prime is 998927. The next prime is 998941. The reversal of 998940 is 49899.

It is a super-2 number, since 2×998940² = 1995762247200, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998941) by changing a digit.

998940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8265 + ... + 8384.

It is an arithmetic number, because the mean of its divisors is an integer number (116550).

2⁹⁹⁸⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

998940 is an abundant number, since it is smaller than the sum of its proper divisors (1798260).

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

998940 is a wasteful number, since it uses less digits than its factorization.

998940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16661 (or 16659 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 998940 is about 999.4698594755. The cubic root of 998940 is about 99.9646541749.

The spelling of 998940 in words is "nine hundred ninety-eight thousand, nine hundred forty".