400000440029 has 2 divisors, whose sum is σ = 400000440030. Its totient is φ = 400000440028.

The previous prime is 400000439981. The next prime is 400000440061. The reversal of 400000440029 is 920044000004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323644934404 + 76355505625 = 568898^2 + 276325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400000440029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400000439986 and 400000440013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400000440929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200000220014 + 200000220015.

It is an arithmetic number, because the mean of its divisors is an integer number (200000220015).

Almost surely, 2^400000440029 is an apocalyptic number.

It is an amenable number.

400000440029 is a deficient number, since it is larger than the sum of its proper divisors (1).

400000440029 is an equidigital number, since it uses as much as digits as its factorization.

400000440029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The spelling of 400000440029 in words is "four hundred billion, four hundred forty thousand, twenty-nine".