109856 has 12 divisors (see below), whose sum is σ = 216342. Its totient is φ = 54912.

The previous prime is 109849. The next prime is 109859. The reversal of 109856 is 658901.

It can be written as a sum of positive squares in only one way, i.e., 99856 + 10000 = 316^2 + 100^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (109859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1685 + ... + 1748.

2¹⁰⁹⁸⁵⁶ is an apocalyptic number.

109856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

109856 is a deficient number, since it is larger than the sum of its proper divisors (106486).

109856 is an equidigital number, since it uses as much as digits as its factorization.

109856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443 (or 3435 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 109856 is about 331.4453197739. The cubic root of 109856 is about 47.8932814266.

The spelling of 109856 in words is "one hundred nine thousand, eight hundred fifty-six".