105771840 has 112 divisors (see below), whose sum is σ = 337962240. Its totient is φ = 28026880.

The previous prime is 105771829. The next prime is 105771847. The reversal of 105771840 is 48177501.

It is a super-2 number, since 2×105771840² = 22375364273971200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105771847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229210 + ... + 229670.

It is an arithmetic number, because the mean of its divisors is an integer number (3017520).

Almost surely, 2^105771840 is an apocalyptic number.

105771840 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 105771840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168981120).

105771840 is an abundant number, since it is smaller than the sum of its proper divisors (232190400).

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

105771840 is a wasteful number, since it uses less digits than its factorization.

105771840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 105771840 is about 10284.5437429183. The cubic root of 105771840 is about 472.9225469026.

The spelling of 105771840 in words is "one hundred five million, seven hundred seventy-one thousand, eight hundred forty".