128812700 has 36 divisors (see below), whose sum is σ = 280971600. Its totient is φ = 51258240.

The previous prime is 128812687. The next prime is 128812703. The reversal of 128812700 is 7218821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128812703) 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, 16664 + ... + 23136.

Almost surely, 2^128812700 is an apocalyptic number.

128812700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128812700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140485800).

128812700 is an abundant number, since it is smaller than the sum of its proper divisors (152158900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128812700 is a wasteful number, since it uses less digits than its factorization.

128812700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6686 (or 6679 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 128812700 is about 11349.5682737274. The cubic root of 128812700 is about 505.0327724377.

The spelling of 128812700 in words is "one hundred twenty-eight million, eight hundred twelve thousand, seven hundred".