128423211 has 8 divisors (see below), whose sum is σ = 195692544. Its totient is φ = 73384680.

The previous prime is 128423203. The next prime is 128423227. The reversal of 128423211 is 112324821.

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

It is not a de Polignac number, because 128423211 - 2³ = 128423203 is a prime.

It is a super-2 number, since 2×128423211² = 32985042247101042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128423201) 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, 3057675 + ... + 3057716.

It is an arithmetic number, because the mean of its divisors is an integer number (24461568).

Almost surely, 2^128423211 is an apocalyptic number.

128423211 is a deficient number, since it is larger than the sum of its proper divisors (67269333).

128423211 is an equidigital number, since it uses as much as digits as its factorization.

128423211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115401.

The product of its digits is 768, while the sum is 24.

The square root of 128423211 is about 11332.3965250074. The cubic root of 128423211 is about 504.5232385670.

The spelling of 128423211 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, two hundred eleven".