105780 has 48 divisors (see below), whose sum is σ = 310464. Its totient is φ = 26880.

The previous prime is 105769. The next prime is 105817. The reversal of 105780 is 87501.

It is a happy number.

It is a super-2 number, since 2×105780² = 22378816800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

105780 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (6468).

2¹⁰⁵⁷⁸⁰ is an apocalyptic number.

105780 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 105780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155232).

105780 is an abundant number, since it is smaller than the sum of its proper divisors (204684).

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

105780 is a wasteful number, since it uses less digits than its factorization.

105780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 105780 is about 325.2383741197. The cubic root of 105780 is about 47.2934708138.

The spelling of 105780 in words is "one hundred five thousand, seven hundred eighty".