105711840 has 144 divisors (see below), whose sum is σ = 388559808. Its totient is φ = 26016768.

The previous prime is 105711821. The next prime is 105711847. The reversal of 105711840 is 48117501.

105711840 is a `hidden beast` number, since 10 + 571 + 1 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×105711840² = 22349986232371200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105711847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15897 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (2698332).

Almost surely, 2^105711840 is an apocalyptic number.

105711840 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 105711840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194279904).

105711840 is an abundant number, since it is smaller than the sum of its proper divisors (282847968).

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

105711840 is a wasteful number, since it uses less digits than its factorization.

105711840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5670 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 105711840 is about 10281.6263304985. The cubic root of 105711840 is about 472.8331068402.

The spelling of 105711840 in words is "one hundred five million, seven hundred eleven thousand, eight hundred forty".