128035820 has 24 divisors (see below), whose sum is σ = 293318928. Its totient is φ = 46558400.

The previous prime is 128035793. The next prime is 128035837. The reversal of 128035820 is 28530821.

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, 290771 + ... + 291210.

It is an arithmetic number, because the mean of its divisors is an integer number (12221622).

Almost surely, 2^128035820 is an apocalyptic number.

128035820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128035820 is an abundant number, since it is smaller than the sum of its proper divisors (165283108).

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

128035820 is a wasteful number, since it uses less digits than its factorization.

128035820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582001 (or 581999 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 128035820 is about 11315.2914235560. The cubic root of 128035820 is about 504.0154263776.

The spelling of 128035820 in words is "one hundred twenty-eight million, thirty-five thousand, eight hundred twenty".