409998 has 16 divisors (see below), whose sum is σ = 855936. Its totient is φ = 130680.

The previous prime is 409993. The next prime is 409999. The reversal of 409998 is 899904.

409998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 409998.

It is not an unprimeable number, because it can be changed into a prime (409993) by changing a digit.

409998 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, 1348 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (53496).

2⁴⁰⁹⁹⁹⁸ is an apocalyptic number.

409998 is an abundant number, since it is smaller than the sum of its proper divisors (445938).

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

409998 is a wasteful number, since it uses less digits than its factorization.

409998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

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

The square root of 409998 is about 640.3108620038. The cubic root of 409998 is about 74.2894676182.

The spelling of 409998 in words is "four hundred nine thousand, nine hundred ninety-eight".