109878 has 8 divisors (see below), whose sum is σ = 219768. Its totient is φ = 36624.

The previous prime is 109873. The next prime is 109883. The reversal of 109878 is 878901.

It is an interprime number because it is at equal distance from previous prime (109873) and next prime (109883).

It is a sphenic number, since it is the product of 3 distinct primes.

109878 is an admirable number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109873) 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, 9151 + ... + 9162.

It is an arithmetic number, because the mean of its divisors is an integer number (27471).

2¹⁰⁹⁸⁷⁸ is an apocalyptic number.

109878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

109878 is a wasteful number, since it uses less digits than its factorization.

109878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18318.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 109878 is about 331.4785060905. The cubic root of 109878 is about 47.8964782839.

It can be divided in two parts, 1098 and 78, that added together give a triangular number (1176 = T₄₈).

The spelling of 109878 in words is "one hundred nine thousand, eight hundred seventy-eight".