128813212 has 36 divisors (see below), whose sum is σ = 251898808. Its totient is φ = 57578400.

The previous prime is 128813197. The next prime is 128813221. The reversal of 128813212 is 212318821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27343 + ... + 31705.

Almost surely, 2^128813212 is an apocalyptic number.

It is an amenable number.

128813212 is a deficient number, since it is larger than the sum of its proper divisors (123085596).

128813212 is a wasteful number, since it uses less digits than its factorization.

128813212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450 (or 4437 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 128813212 is about 11349.5908296291. The cubic root of 128813212 is about 505.0334415654.

The spelling of 128813212 in words is "one hundred twenty-eight million, eight hundred thirteen thousand, two hundred twelve".