105711820 has 48 divisors (see below), whose sum is σ = 234743040. Its totient is φ = 39877056.

The previous prime is 105711791. The next prime is 105711821. The reversal of 105711820 is 28117501.

It is a super-2 number, since 2×105711820² = 22349977775424800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105711821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107049 + ... + 108031.

It is an arithmetic number, because the mean of its divisors is an integer number (4890480).

Almost surely, 2^105711820 is an apocalyptic number.

105711820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 105711820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117371520).

105711820 is an abundant number, since it is smaller than the sum of its proper divisors (129031220).

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

105711820 is a wasteful number, since it uses less digits than its factorization.

105711820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 105711820 is about 10281.6253578897. The cubic root of 105711820 is about 472.8330770212.

The spelling of 105711820 in words is "one hundred five million, seven hundred eleven thousand, eight hundred twenty".