108728720 has 40 divisors (see below), whose sum is σ = 258967800. Its totient is φ = 42429440.

The previous prime is 108728701. The next prime is 108728729. The reversal of 108728720 is 27827801.

It can be written as a sum of positive squares in 4 ways, for example, as 16875664 + 91853056 = 4108^2 + 9584^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (108728729) 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, 13295 + ... + 19854.

It is an arithmetic number, because the mean of its divisors is an integer number (6474195).

Almost surely, 2^108728720 is an apocalyptic number.

108728720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108728720 is an abundant number, since it is smaller than the sum of its proper divisors (150239080).

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

108728720 is a wasteful number, since it uses less digits than its factorization.

108728720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33203 (or 33197 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 108728720 is about 10427.3064594842. The cubic root of 108728720 is about 477.2889997283.

The spelling of 108728720 in words is "one hundred eight million, seven hundred twenty-eight thousand, seven hundred twenty".