40280189 has 2 divisors, whose sum is σ = 40280190. Its totient is φ = 40280188.

The previous prime is 40280183. The next prime is 40280203. The reversal of 40280189 is 98108204.

It is a happy number.

40280189 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., 37332100 + 2948089 = 6110^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 40280189 - 2⁴ = 40280173 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 (40280183) 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, 20140094 + 20140095.

It is an arithmetic number, because the mean of its divisors is an integer number (20140095).

Almost surely, 2^40280189 is an apocalyptic number.

It is an amenable number.

40280189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40280189 is an equidigital number, since it uses as much as digits as its factorization.

40280189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 40280189 is about 6346.6675507702. The cubic root of 40280189 is about 342.7918594865.

The spelling of 40280189 in words is "forty million, two hundred eighty thousand, one hundred eighty-nine".