111728345 has 8 divisors (see below), whose sum is σ = 137697864. Its totient is φ = 86966784.

The previous prime is 111728333. The next prime is 111728347. The reversal of 111728345 is 543827111.

It can be written as a sum of positive squares in 4 ways, for example, as 7463824 + 104264521 = 2732^2 + 10211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111728345 - 2¹⁰ = 111727321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111728347) 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, 301784 + ... + 302153.

It is an arithmetic number, because the mean of its divisors is an integer number (17212233).

Almost surely, 2^111728345 is an apocalyptic number.

It is an amenable number.

111728345 is a deficient number, since it is larger than the sum of its proper divisors (25969519).

111728345 is an equidigital number, since it uses as much as digits as its factorization.

111728345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603979.

The product of its digits is 6720, while the sum is 32.

The square root of 111728345 is about 10570.1629599548. The cubic root of 111728345 is about 481.6384187540.

The spelling of 111728345 in words is "one hundred eleven million, seven hundred twenty-eight thousand, three hundred forty-five".