404444389 has 2 divisors, whose sum is σ = 404444390. Its totient is φ = 404444388.

The previous prime is 404444357. The next prime is 404444401. The reversal of 404444389 is 983444404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259049025 + 145395364 = 16095^2 + 12058^2 .

It is a cyclic number.

It is not a de Polignac number, because 404444389 - 2⁵ = 404444357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408444389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202222194 + 202222195.

It is an arithmetic number, because the mean of its divisors is an integer number (202222195).

Almost surely, 2^404444389 is an apocalyptic number.

It is an amenable number.

404444389 is a deficient number, since it is larger than the sum of its proper divisors (1).

404444389 is an equidigital number, since it uses as much as digits as its factorization.

404444389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 404444389 is about 20110.8027935237. The cubic root of 404444389 is about 739.5251330047.

The spelling of 404444389 in words is "four hundred four million, four hundred forty-four thousand, three hundred eighty-nine".