109281280 has 128 divisors (see below), whose sum is σ = 283111200. Its totient is φ = 40370176.

The previous prime is 109281259. The next prime is 109281281. The reversal of 109281280 is 82182901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109281281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3768306 + ... + 3768334.

Almost surely, 2^109281280 is an apocalyptic number.

109281280 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 109281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141555600).

109281280 is an abundant number, since it is smaller than the sum of its proper divisors (173829920).

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

109281280 is an frugal number, since it uses more digits than its factorization.

109281280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 109281280 is about 10453.7686984169. The cubic root of 109281280 is about 478.0961624426.

It can be divided in two parts, 109281 and 280, that added together give a square (109561 = 331²).

The spelling of 109281280 in words is "one hundred nine million, two hundred eighty-one thousand, two hundred eighty".