109251728 has 30 divisors (see below), whose sum is σ = 213810534. Its totient is φ = 54079488.

The previous prime is 109251721. The next prime is 109251731. The reversal of 109251728 is 827152901.

It can be written as a sum of positive squares in only one way, i.e., 108826624 + 425104 = 10432^2 + 652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109251721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424976 + ... + 425232.

Almost surely, 2^109251728 is an apocalyptic number.

It is an amenable number.

109251728 is a deficient number, since it is larger than the sum of its proper divisors (104558806).

109251728 is an equidigital number, since it uses as much as digits as its factorization.

109251728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 109251728 is about 10452.3551413067. The cubic root of 109251728 is about 478.0530627414.

The spelling of 109251728 in words is "one hundred nine million, two hundred fifty-one thousand, seven hundred twenty-eight".