128704020 has 24 divisors (see below), whose sum is σ = 360371424. Its totient is φ = 34321056.

The previous prime is 128704003. The next prime is 128704049. The reversal of 128704020 is 20407821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072474 + ... + 1072593.

It is an arithmetic number, because the mean of its divisors is an integer number (15015476).

Almost surely, 2^128704020 is an apocalyptic number.

128704020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128704020 is an abundant number, since it is smaller than the sum of its proper divisors (231667404).

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

128704020 is a wasteful number, since it uses less digits than its factorization.

128704020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145079 (or 2145077 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 128704020 is about 11344.7794161015. The cubic root of 128704020 is about 504.8906994768.

The spelling of 128704020 in words is "one hundred twenty-eight million, seven hundred four thousand, twenty".