128786212 has 12 divisors (see below), whose sum is σ = 225486940. Its totient is φ = 64361376.

The previous prime is 128786209. The next prime is 128786243. The reversal of 128786212 is 212687821.

It can be written as a sum of positive squares in 2 ways, for example, as 58125376 + 70660836 = 7624^2 + 8406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2818 + ... + 16294.

Almost surely, 2^128786212 is an apocalyptic number.

It is an amenable number.

128786212 is a deficient number, since it is larger than the sum of its proper divisors (96700728).

128786212 is a wasteful number, since it uses less digits than its factorization.

128786212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15870 (or 15868 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 128786212 is about 11348.4012970991. The cubic root of 128786212 is about 504.9981531155.

The spelling of 128786212 in words is "one hundred twenty-eight million, seven hundred eighty-six thousand, two hundred twelve".