4028865 has 16 divisors (see below), whose sum is σ = 6604416. Its totient is φ = 2096000.

The previous prime is 4028863. The next prime is 4028891. The reversal of 4028865 is 5688204.

It is not a de Polignac number, because 4028865 - 2¹ = 4028863 is a prime.

4028865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4028863) 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 15 ways as a sum of consecutive naturals, for example, 2661 + ... + 3890.

It is an arithmetic number, because the mean of its divisors is an integer number (412776).

Almost surely, 2^4028865 is an apocalyptic number.

It is an amenable number.

4028865 is a deficient number, since it is larger than the sum of its proper divisors (2575551).

4028865 is a wasteful number, since it uses less digits than its factorization.

4028865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 4028865 is about 2007.2032781958. The cubic root of 4028865 is about 159.1210264812.

The spelling of 4028865 in words is "four million, twenty-eight thousand, eight hundred sixty-five".