4028389 has 2 divisors, whose sum is σ = 4028390. Its totient is φ = 4028388.

The previous prime is 4028363. The next prime is 4028413. The reversal of 4028389 is 9838204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3932289 + 96100 = 1983^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4028389 - 2⁷ = 4028261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4028309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2014194 + 2014195.

It is an arithmetic number, because the mean of its divisors is an integer number (2014195).

Almost surely, 2^4028389 is an apocalyptic number.

It is an amenable number.

4028389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4028389 is an equidigital number, since it uses as much as digits as its factorization.

4028389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 4028389 is about 2007.0847017503. The cubic root of 4028389 is about 159.1147596549.

The spelling of 4028389 in words is "four million, twenty-eight thousand, three hundred eighty-nine".