109870 has 8 divisors (see below), whose sum is σ = 197784. Its totient is φ = 43944.

The previous prime is 109859. The next prime is 109873. The reversal of 109870 is 78901.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109873) by changing a digit.

109870 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 3 ways as a sum of consecutive naturals, for example, 5484 + ... + 5503.

It is an arithmetic number, because the mean of its divisors is an integer number (24723).

2¹⁰⁹⁸⁷⁰ is an apocalyptic number.

109870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109870 is a deficient number, since it is larger than the sum of its proper divisors (87914).

109870 is a wasteful number, since it uses less digits than its factorization.

109870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10994.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 109870 is about 331.4664387234. The cubic root of 109870 is about 47.8953158397.

It can be divided in two parts, 109 and 870, that multiplied together give a triangular number (94830 = T₄₃₅).

The spelling of 109870 in words is "one hundred nine thousand, eight hundred seventy".