128578211 has 12 divisors (see below), whose sum is σ = 135971640. Its totient is φ = 121561440.

The previous prime is 128578201. The next prime is 128578217. The reversal of 128578211 is 112875821.

It is not a de Polignac number, because 128578211 - 2¹⁰ = 128577187 is a prime.

It is a super-3 number, since 3×128578211³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128578217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45716 + ... + 48446.

It is an arithmetic number, because the mean of its divisors is an integer number (11330970).

Almost surely, 2^128578211 is an apocalyptic number.

128578211 is a deficient number, since it is larger than the sum of its proper divisors (7393429).

128578211 is an equidigital number, since it uses as much as digits as its factorization.

128578211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866 (or 2843 counting only the distinct ones).

The product of its digits is 8960, while the sum is 35.

The square root of 128578211 is about 11339.2332633208. The cubic root of 128578211 is about 504.7261345516.

The spelling of 128578211 in words is "one hundred twenty-eight million, five hundred seventy-eight thousand, two hundred eleven".