108219920 has 20 divisors (see below), whose sum is σ = 251611500. Its totient is φ = 43287936.

The previous prime is 108219919. The next prime is 108219929. The reversal of 108219920 is 29912801.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19784704 + 88435216 = 4448^2 + 9404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (108219929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676295 + ... + 676454.

It is an arithmetic number, because the mean of its divisors is an integer number (12580575).

Almost surely, 2^108219920 is an apocalyptic number.

108219920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108219920 is an abundant number, since it is smaller than the sum of its proper divisors (143391580).

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

108219920 is a wasteful number, since it uses less digits than its factorization.

108219920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352762 (or 1352756 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 108219920 is about 10402.8803703590. The cubic root of 108219920 is about 476.5433383212.

The spelling of 108219920 in words is "one hundred eight million, two hundred nineteen thousand, nine hundred twenty".