4028605 has 32 divisors (see below), whose sum is σ = 5898240. Its totient is φ = 2583360.

The previous prime is 4028603. The next prime is 4028621. The reversal of 4028605 is 5068204.

4028605 = 13² + 14² + ... + 229².

It is not a de Polignac number, because 4028605 - 2¹ = 4028603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4028605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50956 + ... + 51034.

It is an arithmetic number, because the mean of its divisors is an integer number (184320).

Almost surely, 2^4028605 is an apocalyptic number.

It is an amenable number.

4028605 is a deficient number, since it is larger than the sum of its proper divisors (1869635).

4028605 is a wasteful number, since it uses less digits than its factorization.

4028605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4028605 is about 2007.1385104173. The cubic root of 4028605 is about 159.1176034860.

The spelling of 4028605 in words is "four million, twenty-eight thousand, six hundred five".