128646219 has 8 divisors (see below), whose sum is σ = 184722832. Its totient is φ = 79166880.

The previous prime is 128646197. The next prime is 128646227. The reversal of 128646219 is 912646821.

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

It is not a de Polignac number, because 128646219 - 2¹² = 128642123 is a prime.

It is a super-2 number, since 2×128646219² = 33099699325991922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3298621 = 128646219 / (1 + 2 + 8 + 6 + 4 + 6 + 2 + 1 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128646229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649272 + ... + 1649349.

It is an arithmetic number, because the mean of its divisors is an integer number (23090354).

Almost surely, 2^128646219 is an apocalyptic number.

128646219 is a deficient number, since it is larger than the sum of its proper divisors (56076613).

128646219 is a wasteful number, since it uses less digits than its factorization.

128646219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298637.

The product of its digits is 41472, while the sum is 39.

The square root of 128646219 is about 11342.2316587169. The cubic root of 128646219 is about 504.8151059894.

The spelling of 128646219 in words is "one hundred twenty-eight million, six hundred forty-six thousand, two hundred nineteen".