128934020 has 24 divisors (see below), whose sum is σ = 272389824. Its totient is φ = 51263456.

The previous prime is 128934007. The next prime is 128934023. The reversal of 128934020 is 20439821.

It is not an unprimeable number, because it can be changed into a prime (128934023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15962 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (11349576).

Almost surely, 2^128934020 is an apocalyptic number.

128934020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128934020 is an abundant number, since it is smaller than the sum of its proper divisors (143455804).

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

128934020 is a wasteful number, since it uses less digits than its factorization.

128934020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38779 (or 38777 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 128934020 is about 11354.9117125586. The cubic root of 128934020 is about 505.1912747968.

The spelling of 128934020 in words is "one hundred twenty-eight million, nine hundred thirty-four thousand, twenty".