105821398 has 8 divisors (see below), whose sum is σ = 158782392. Its totient is φ = 52893936.

The previous prime is 105821371. The next prime is 105821411. The reversal of 105821398 is 893128501.

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

It is a super-2 number, since 2×105821398² = 22396336549348808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161 + ... + 14707.

It is an arithmetic number, because the mean of its divisors is an integer number (19847799).

Almost surely, 2^105821398 is an apocalyptic number.

105821398 is a deficient number, since it is larger than the sum of its proper divisors (52960994).

105821398 is a wasteful number, since it uses less digits than its factorization.

105821398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16766.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 105821398 is about 10286.9528044023. The cubic root of 105821398 is about 472.9963959099.

Adding to 105821398 its reverse (893128501), we get a palindrome (998949899).

The spelling of 105821398 in words is "one hundred five million, eight hundred twenty-one thousand, three hundred ninety-eight".