440401889 has 2 divisors, whose sum is σ = 440401890. Its totient is φ = 440401888.

The previous prime is 440401873. The next prime is 440401933. The reversal of 440401889 is 988104044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440286289 + 115600 = 20983^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 440401889 - 2⁴ = 440401873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440401289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220200944 + 220200945.

It is an arithmetic number, because the mean of its divisors is an integer number (220200945).

Almost surely, 2^440401889 is an apocalyptic number.

It is an amenable number.

440401889 is a deficient number, since it is larger than the sum of its proper divisors (1).

440401889 is an equidigital number, since it uses as much as digits as its factorization.

440401889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 440401889 is about 20985.7544300890. The cubic root of 440401889 is about 760.8219921022.

The spelling of 440401889 in words is "four hundred forty million, four hundred one thousand, eight hundred eighty-nine".