8109144 has 72 divisors (see below), whose sum is σ = 22846980. Its totient is φ = 2597760.

The previous prime is 8109139. The next prime is 8109149. The reversal of 8109144 is 4419018.

It is an interprime number because it is at equal distance from previous prime (8109139) and next prime (8109149).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109149) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 120999 + ... + 121065.

Almost surely, 2^8109144 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 8109144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11423490).

8109144 is an abundant number, since it is smaller than the sum of its proper divisors (14737836).

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

8109144 is a wasteful number, since it uses less digits than its factorization.

8109144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8109144 is about 2847.6558780864. The cubic root of 8109144 is about 200.9054281471.

The spelling of 8109144 in words is "eight million, one hundred nine thousand, one hundred forty-four".