128054020 has 12 divisors (see below), whose sum is σ = 268913484. Its totient is φ = 51221600.

The previous prime is 128054011. The next prime is 128054021. The reversal of 128054020 is 20450821.

It can be written as a sum of positive squares in 2 ways, for example, as 18181696 + 109872324 = 4264^2 + 10482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128053982 and 128054000.

It is not an unprimeable number, because it can be changed into a prime (128054021) 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 3 ways as a sum of consecutive naturals, for example, 3201331 + ... + 3201370.

It is an arithmetic number, because the mean of its divisors is an integer number (22409457).

Almost surely, 2^128054020 is an apocalyptic number.

128054020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128054020 is an abundant number, since it is smaller than the sum of its proper divisors (140859464).

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

128054020 is a wasteful number, since it uses less digits than its factorization.

128054020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402710 (or 6402708 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 128054020 is about 11316.0956164218. The cubic root of 128054020 is about 504.0393067941.

The spelling of 128054020 in words is "one hundred twenty-eight million, fifty-four thousand, twenty".