99438 has 8 divisors (see below), whose sum is σ = 198888. Its totient is φ = 33144.

The previous prime is 99431. The next prime is 99439. The reversal of 99438 is 83499.

It is a sphenic number, since it is the product of 3 distinct primes.

99438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 99399 and 99408.

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 99438.

It is not an unprimeable number, because it can be changed into a prime (99431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8281 + ... + 8292.

It is an arithmetic number, because the mean of its divisors is an integer number (24861).

2⁹⁹⁴³⁸ is an apocalyptic number.

99438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99444).

99438 is a wasteful number, since it uses less digits than its factorization.

99438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578.

The product of its digits is 7776, while the sum is 33.

The square root of 99438 is about 315.3379139907. The cubic root of 99438 is about 46.3287725039.

The spelling of 99438 in words is "ninety-nine thousand, four hundred thirty-eight".