40266389 has 2 divisors, whose sum is σ = 40266390. Its totient is φ = 40266388.

The previous prime is 40266383. The next prime is 40266403. The reversal of 40266389 is 98366204.

40266389 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., 38850289 + 1416100 = 6233^2 + 1190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40266389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40266383) 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, 20133194 + 20133195.

It is an arithmetic number, because the mean of its divisors is an integer number (20133195).

Almost surely, 2^40266389 is an apocalyptic number.

It is an amenable number.

40266389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40266389 is an equidigital number, since it uses as much as digits as its factorization.

40266389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 40266389 is about 6345.5802729144. The cubic root of 40266389 is about 342.7527081642.

The spelling of 40266389 in words is "forty million, two hundred sixty-six thousand, three hundred eighty-nine".