128870700 has 144 divisors (see below), whose sum is σ = 430805760. Its totient is φ = 29134080.

The previous prime is 128870617. The next prime is 128870717. The reversal of 128870700 is 7078821.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228619 + ... + 229181.

Almost surely, 2^128870700 is an apocalyptic number.

128870700 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 128870700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215402880).

128870700 is an abundant number, since it is smaller than the sum of its proper divisors (301935060).

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

128870700 is a wasteful number, since it uses less digits than its factorization.

128870700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 128870700 is about 11352.1231494377. The cubic root of 128870700 is about 505.1085607866.

The spelling of 128870700 in words is "one hundred twenty-eight million, eight hundred seventy thousand, seven hundred".