105440 has 24 divisors (see below), whose sum is σ = 249480. Its totient is φ = 42112.

The previous prime is 105437. The next prime is 105449. The reversal of 105440 is 44501.

It is a super-2 number, since 2×105440² = 22235187200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 489.

It is an arithmetic number, because the mean of its divisors is an integer number (10395).

2¹⁰⁵⁴⁴⁰ is an apocalyptic number.

105440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105440 is an abundant number, since it is smaller than the sum of its proper divisors (144040).

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

105440 is an equidigital number, since it uses as much as digits as its factorization.

105440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 105440 is about 324.7152598816. The cubic root of 105440 is about 47.2427459166.

Adding to 105440 its reverse (44501), we get a palindrome (149941).

It can be divided in two parts, 105 and 440, that added together give a palindrome (545).

The spelling of 105440 in words is "one hundred five thousand, four hundred forty".