128049206 has 4 divisors (see below), whose sum is σ = 192073812. Its totient is φ = 64024602.

The previous prime is 128049179. The next prime is 128049209. The reversal of 128049206 is 602940821.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128049209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32012300 + ... + 32012303.

It is an arithmetic number, because the mean of its divisors is an integer number (48018453).

Almost surely, 2^128049206 is an apocalyptic number.

128049206 is a deficient number, since it is larger than the sum of its proper divisors (64024606).

128049206 is an equidigital number, since it uses as much as digits as its factorization.

128049206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64024605.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 128049206 is about 11315.8829085494. The cubic root of 128049206 is about 504.0329905129.

The spelling of 128049206 in words is "one hundred twenty-eight million, forty-nine thousand, two hundred six".