105805438 has 4 divisors (see below), whose sum is σ = 158708160. Its totient is φ = 52902718.

The previous prime is 105805423. The next prime is 105805463. The reversal of 105805438 is 834508501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834508501 = 10589 ⋅78809.

It is a super-2 number, since 2×105805438² = 22389581420743688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26451358 + ... + 26451361.

It is an arithmetic number, because the mean of its divisors is an integer number (39677040).

Almost surely, 2^105805438 is an apocalyptic number.

105805438 is a deficient number, since it is larger than the sum of its proper divisors (52902722).

105805438 is an equidigital number, since it uses as much as digits as its factorization.

105805438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52902721.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 105805438 is about 10286.1770352255. The cubic root of 105805438 is about 472.9726155839.

The spelling of 105805438 in words is "one hundred five million, eight hundred five thousand, four hundred thirty-eight".