128270870 has 64 divisors (see below), whose sum is σ = 293400576. Its totient is φ = 39277440.

The previous prime is 128270869. The next prime is 128270911. The reversal of 128270870 is 78072821.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 128270870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25937 + ... + 30483.

It is an arithmetic number, because the mean of its divisors is an integer number (4584384).

Almost surely, 2^128270870 is an apocalyptic number.

128270870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128270870 is an abundant number, since it is smaller than the sum of its proper divisors (165129706).

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

128270870 is a wasteful number, since it uses less digits than its factorization.

128270870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 128270870 is about 11325.6730484329. The cubic root of 128270870 is about 504.3236640885.

The spelling of 128270870 in words is "one hundred twenty-eight million, two hundred seventy thousand, eight hundred seventy".