40448189 has 2 divisors, whose sum is σ = 40448190. Its totient is φ = 40448188.

The previous prime is 40448183. The next prime is 40448201. The reversal of 40448189 is 98184404.

40448189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40424164 + 24025 = 6358^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 40448189 - 2⁴ = 40448173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40448183) 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, 20224094 + 20224095.

It is an arithmetic number, because the mean of its divisors is an integer number (20224095).

Almost surely, 2^40448189 is an apocalyptic number.

It is an amenable number.

40448189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40448189 is an equidigital number, since it uses as much as digits as its factorization.

40448189 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 40448189 is about 6359.8890713597. The cubic root of 40448189 is about 343.2677688190.

The spelling of 40448189 in words is "forty million, four hundred forty-eight thousand, one hundred eighty-nine".