4428685 has 4 divisors (see below), whose sum is σ = 5314428. Its totient is φ = 3542944.

The previous prime is 4428643. The next prime is 4428689. The reversal of 4428685 is 5868244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3481956 + 946729 = 1866^2 + 973^2 .

It is a cyclic number.

It is not a de Polignac number, because 4428685 - 2¹⁵ = 4395917 is a prime.

It is a super-2 number, since 2×4428685² = 39226501658450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁷ + 4¹¹ + 2¹⁷ + 8³ + 6⁵ + 8³ + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4428689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442864 + ... + 442873.

It is an arithmetic number, because the mean of its divisors is an integer number (1328607).

Almost surely, 2^4428685 is an apocalyptic number.

It is an amenable number.

4428685 is a deficient number, since it is larger than the sum of its proper divisors (885743).

4428685 is an equidigital number, since it uses as much as digits as its factorization.

4428685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885742.

The product of its digits is 61440, while the sum is 37.

The square root of 4428685 is about 2104.4441071219. Note that the first 3 decimals coincide. The cubic root of 4428685 is about 164.2195774835.

The spelling of 4428685 in words is "four million, four hundred twenty-eight thousand, six hundred eighty-five".