4040389 has 2 divisors, whose sum is σ = 4040390. Its totient is φ = 4040388.

The previous prime is 4040383. The next prime is 4040401. The reversal of 4040389 is 9830404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4040100 + 289 = 2010^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040389 - 2²¹ = 1943237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040383) 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 as a sum of consecutive naturals, namely, 2020194 + 2020195.

It is an arithmetic number, because the mean of its divisors is an integer number (2020195).

Almost surely, 2^4040389 is an apocalyptic number.

It is an amenable number.

4040389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040389 is an equidigital number, since it uses as much as digits as its factorization.

4040389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4040389 is about 2010.0718892617. The cubic root of 4040389 is about 159.2725964747.

The spelling of 4040389 in words is "four million, forty thousand, three hundred eighty-nine".