40040029 has 2 divisors, whose sum is σ = 40040030. Its totient is φ = 40040028.

The previous prime is 40040027. The next prime is 40040041. The reversal of 40040029 is 92004004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37234404 + 2805625 = 6102^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040029 - 2¹ = 40040027 is a prime.

Together with 40040027, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40039988 and 40040015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40040027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020014 + 20020015.

It is an arithmetic number, because the mean of its divisors is an integer number (20020015).

Almost surely, 2^40040029 is an apocalyptic number.

It is an amenable number.

40040029 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040029 is an equidigital number, since it uses as much as digits as its factorization.

40040029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 40040029 is about 6327.7190993280. The cubic root of 40040029 is about 342.1092323472.

The spelling of 40040029 in words is "forty million, forty thousand, twenty-nine".