998040 has 32 divisors (see below), whose sum is σ = 2994480. Its totient is φ = 266112.

The previous prime is 998029. The next prime is 998069. The reversal of 998040 is 40899.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 997989 and 998007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4039 + ... + 4278.

2⁹⁹⁸⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

998040 is an abundant number, since it is smaller than the sum of its proper divisors (1996440).

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

998040 is a wasteful number, since it uses less digits than its factorization.

998040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331 (or 8327 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 998040 is about 999.0195193288. The cubic root of 998040 is about 99.9346239357.

The spelling of 998040 in words is "nine hundred ninety-eight thousand, forty".