4028644 has 6 divisors (see below), whose sum is σ = 7050134. Its totient is φ = 2014320.

The previous prime is 4028641. The next prime is 4028663. The reversal of 4028644 is 4468204.

It can be written as a sum of positive squares in only one way, i.e., 2683044 + 1345600 = 1638^2 + 1160^2 .

It is not an unprimeable number, because it can be changed into a prime (4028641) 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 as a sum of consecutive naturals, namely, 503577 + ... + 503584.

Almost surely, 2^4028644 is an apocalyptic number.

It is an amenable number.

4028644 is a deficient number, since it is larger than the sum of its proper divisors (3021490).

4028644 is a wasteful number, since it uses less digits than its factorization.

4028644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007165 (or 1007163 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 4028644 is about 2007.1482257173. The cubic root of 4028644 is about 159.1181169446.

The spelling of 4028644 in words is "four million, twenty-eight thousand, six hundred forty-four".