108609820 has 48 divisors (see below), whose sum is σ = 254905056. Its totient is φ = 38528000.

The previous prime is 108609817. The next prime is 108609827. The reversal of 108609820 is 28906801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108609827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3000 + ... + 15040.

It is an arithmetic number, because the mean of its divisors is an integer number (5310522).

Almost surely, 2^108609820 is an apocalyptic number.

108609820 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 108609820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127452528).

108609820 is an abundant number, since it is smaller than the sum of its proper divisors (146295236).

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

108609820 is a wasteful number, since it uses less digits than its factorization.

108609820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12102 (or 12100 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 108609820 is about 10421.6035234507. The cubic root of 108609820 is about 477.1149569032.

The spelling of 108609820 in words is "one hundred eight million, six hundred nine thousand, eight hundred twenty".