128070820 has 24 divisors (see below), whose sum is σ = 269252928. Its totient is φ = 51170400.

The previous prime is 128070799. The next prime is 128070821. The reversal of 128070820 is 28070821.

It is not an unprimeable number, because it can be changed into a prime (128070821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17515 + ... + 23725.

It is an arithmetic number, because the mean of its divisors is an integer number (11218872).

Almost surely, 2^128070820 is an apocalyptic number.

128070820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128070820 is an abundant number, since it is smaller than the sum of its proper divisors (141182108).

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

128070820 is a wasteful number, since it uses less digits than its factorization.

128070820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7251 (or 7249 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 128070820 is about 11316.8378975755. The cubic root of 128070820 is about 504.0613482473.

Subtracting from 128070820 its reverse (28070821), we obtain a palindrome (99999999).

The spelling of 128070820 in words is "one hundred twenty-eight million, seventy thousand, eight hundred twenty".