4128945220 has 12 divisors (see below), whose sum is σ = 8670785004. Its totient is φ = 1651578080.

The previous prime is 4128945217. The next prime is 4128945263. The reversal of 4128945220 is 225498214.

It can be written as a sum of positive squares in 2 ways, for example, as 435223044 + 3693722176 = 20862^2 + 60776^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4128945220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103223611 + ... + 103223650.

It is an arithmetic number, because the mean of its divisors is an integer number (722565417).

Almost surely, 2^4128945220 is an apocalyptic number.

It is an amenable number.

4128945220 is an abundant number, since it is smaller than the sum of its proper divisors (4541839784).

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

4128945220 is a wasteful number, since it uses less digits than its factorization.

4128945220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206447270 (or 206447268 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 4128945220 is about 64256.8690491530. The cubic root of 4128945220 is about 1604.2782921263.

The spelling of 4128945220 in words is "four billion, one hundred twenty-eight million, nine hundred forty-five thousand, two hundred twenty".