127728365 has 8 divisors (see below), whose sum is σ = 154069368. Its totient is φ = 101652480.

The previous prime is 127728353. The next prime is 127728389. The reversal of 127728365 is 563827721.

It can be written as a sum of positive squares in 4 ways, for example, as 16826404 + 110901961 = 4102^2 + 10531^2 .

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

It is not a de Polignac number, because 127728365 - 2⁸ = 127728109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65216 + ... + 67145.

It is an arithmetic number, because the mean of its divisors is an integer number (19258671).

Almost surely, 2^127728365 is an apocalyptic number.

It is an amenable number.

127728365 is a deficient number, since it is larger than the sum of its proper divisors (26341003).

127728365 is a wasteful number, since it uses less digits than its factorization.

127728365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132559.

The product of its digits is 141120, while the sum is 41.

The square root of 127728365 is about 11301.6974388806. The cubic root of 127728365 is about 503.6116688809.

The spelling of 127728365 in words is "one hundred twenty-seven million, seven hundred twenty-eight thousand, three hundred sixty-five".