109685440 has 56 divisors (see below), whose sum is σ = 269638272. Its totient is φ = 42455040.

The previous prime is 109685437. The next prime is 109685473. The reversal of 109685440 is 44586901.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 109685440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4392 + ... + 15448.

Almost surely, 2^109685440 is an apocalyptic number.

109685440 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 109685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134819136).

109685440 is an abundant number, since it is smaller than the sum of its proper divisors (159952832).

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

109685440 is a wasteful number, since it uses less digits than its factorization.

109685440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11105 (or 11095 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 109685440 is about 10473.0816859222. The cubic root of 109685440 is about 478.6848257100.

The spelling of 109685440 in words is "one hundred nine million, six hundred eighty-five thousand, four hundred forty".