4128020 has 24 divisors (see below), whose sum is σ = 9336264. Its totient is φ = 1524096.

The previous prime is 4128013. The next prime is 4128023. The reversal of 4128020 is 208214.

It can be written as a sum of positive squares in 4 ways, for example, as 988036 + 3139984 = 994^2 + 1772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4128020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7679 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (389011).

Almost surely, 2^4128020 is an apocalyptic number.

It is an amenable number.

4128020 is an abundant number, since it is smaller than the sum of its proper divisors (5208244).

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

4128020 is a wasteful number, since it uses less digits than its factorization.

4128020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15899 (or 15897 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4128020 is about 2031.7529377363. The cubic root of 4128020 is about 160.4158453510.

The spelling of 4128020 in words is "four million, one hundred twenty-eight thousand, twenty".