109621980 has 144 divisors (see below), whose sum is σ = 363242880. Its totient is φ = 26597376.

The previous prime is 109621957. The next prime is 109621997. The reversal of 109621980 is 89126901.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184564 + ... + 185156.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^109621980 is an apocalyptic number.

109621980 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 109621980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181621440).

109621980 is an abundant number, since it is smaller than the sum of its proper divisors (253620900).

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

109621980 is a wasteful number, since it uses less digits than its factorization.

109621980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 109621980 is about 10470.0515758042. The cubic root of 109621980 is about 478.5924913663.

The spelling of 109621980 in words is "one hundred nine million, six hundred twenty-one thousand, nine hundred eighty".