105851898 has 24 divisors (see below), whose sum is σ = 232490388. Its totient is φ = 34800192.

The previous prime is 105851891. The next prime is 105851917. The reversal of 105851898 is 898158501.

It can be written as a sum of positive squares in 2 ways, for example, as 105329169 + 522729 = 10263^2 + 723^2 .

It is a super-2 number, since 2×105851898² = 22409248620404808, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105851891) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 38965 + ... + 41592.

Almost surely, 2^105851898 is an apocalyptic number.

105851898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

105851898 is an abundant number, since it is smaller than the sum of its proper divisors (126638490).

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

105851898 is a wasteful number, since it uses less digits than its factorization.

105851898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80638 (or 80635 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 105851898 is about 10288.4351579820. The cubic root of 105851898 is about 473.0418341186.

The spelling of 105851898 in words is "one hundred five million, eight hundred fifty-one thousand, eight hundred ninety-eight".