4028506668 has 36 divisors (see below), whose sum is σ = 10511661888. Its totient is φ = 1299517920.

The previous prime is 4028506663. The next prime is 4028506687. The reversal of 4028506668 is 8666058204.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (4028506661) 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 11 ways as a sum of consecutive naturals, for example, 1803771 + ... + 1806002.

It is an arithmetic number, because the mean of its divisors is an integer number (291990608).

Almost surely, 2^4028506668 is an apocalyptic number.

It is an amenable number.

4028506668 is an abundant number, since it is smaller than the sum of its proper divisors (6483155220).

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

4028506668 is a wasteful number, since it uses less digits than its factorization.

4028506668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609814 (or 3609809 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 4028506668 is about 63470.5181009262. The cubic root of 4028506668 is about 1591.1630887080.

The spelling of 4028506668 in words is "four billion, twenty-eight million, five hundred six thousand, six hundred sixty-eight".