128727393 has 8 divisors (see below), whose sum is σ = 171696000. Its totient is φ = 85788528.

The previous prime is 128727373. The next prime is 128727409. The reversal of 128727393 is 393727821.

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

It is not a de Polignac number, because 128727393 - 2¹⁰ = 128726369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128727353) 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, 6283 + ... + 17231.

It is an arithmetic number, because the mean of its divisors is an integer number (21462000).

Almost surely, 2^128727393 is an apocalyptic number.

It is an amenable number.

128727393 is a deficient number, since it is larger than the sum of its proper divisors (42968607).

128727393 is a wasteful number, since it uses less digits than its factorization.

128727393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14871.

The product of its digits is 127008, while the sum is 42.

The square root of 128727393 is about 11345.8094907327. The cubic root of 128727393 is about 504.9212608015.

It can be divided in two parts, 1287 and 27393, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 128727393 in words is "one hundred twenty-eight million, seven hundred twenty-seven thousand, three hundred ninety-three".