4028565 has 16 divisors (see below), whose sum is σ = 6726528. Its totient is φ = 2054976.

The previous prime is 4028561. The next prime is 4028573. The reversal of 4028565 is 5658204.

It is not a de Polignac number, because 4028565 - 2² = 4028561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028561) 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, 5494 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (420408).

Almost surely, 2^4028565 is an apocalyptic number.

It is an amenable number.

4028565 is a deficient number, since it is larger than the sum of its proper divisors (2697963).

4028565 is a wasteful number, since it uses less digits than its factorization.

4028565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11708.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 4028565 is about 2007.1285459581. The cubic root of 4028565 is about 159.1170768583.

The spelling of 4028565 in words is "four million, twenty-eight thousand, five hundred sixty-five".