100438 has 8 divisors (see below), whose sum is σ = 162288. Its totient is φ = 46344.

The previous prime is 100417. The next prime is 100447. The reversal of 100438 is 834001.

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

It is a congruent number.

It is an unprimeable number.

100438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (20286).

2¹⁰⁰⁴³⁸ is an apocalyptic number.

100438 is a deficient number, since it is larger than the sum of its proper divisors (61850).

100438 is a wasteful number, since it uses less digits than its factorization.

100438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 100438 is about 316.9195481506. The cubic root of 100438 is about 46.4835568330.

Adding to 100438 its reverse (834001), we get a palindrome (934439).

The spelling of 100438 in words is "one hundred thousand, four hundred thirty-eight".