128800812 has 72 divisors (see below), whose sum is σ = 356284656. Its totient is φ = 36097152.

The previous prime is 128800783. The next prime is 128800813. The reversal of 128800812 is 218008821.

It is a self number, because there is not a number n which added to its sum of digits gives 128800812.

It is not an unprimeable number, because it can be changed into a prime (128800813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29098 + ... + 33230.

It is an arithmetic number, because the mean of its divisors is an integer number (4948398).

Almost surely, 2^128800812 is an apocalyptic number.

128800812 is a gapful number since it is divisible by the number (12) 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 128800812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178142328).

128800812 is an abundant number, since it is smaller than the sum of its proper divisors (227483844).

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

128800812 is a wasteful number, since it uses less digits than its factorization.

128800812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 128800812 is about 11349.0445412819. The cubic root of 128800812 is about 505.0172356304.

The spelling of 128800812 in words is "one hundred twenty-eight million, eight hundred thousand, eight hundred twelve".