109681236 has 96 divisors (see below), whose sum is σ = 330624000. Its totient is φ = 30793824.

The previous prime is 109681223. The next prime is 109681237. The reversal of 109681236 is 632186901.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 109681236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109681237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43375 + ... + 45833.

It is an arithmetic number, because the mean of its divisors is an integer number (3444000).

Almost surely, 2^109681236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109681236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165312000).

109681236 is an abundant number, since it is smaller than the sum of its proper divisors (220942764).

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

109681236 is a wasteful number, since it uses less digits than its factorization.

109681236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 109681236 is about 10472.8809789857. The cubic root of 109681236 is about 478.6787099887.

The spelling of 109681236 in words is "one hundred nine million, six hundred eighty-one thousand, two hundred thirty-six".