400406029 has 2 divisors, whose sum is σ = 400406030. Its totient is φ = 400406028.

The previous prime is 400405997. The next prime is 400406087. The reversal of 400406029 is 920604004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400400100 + 5929 = 20010^2 + 77^2 .

It is a cyclic number.

It is not a de Polignac number, because 400406029 - 2⁵ = 400405997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400405994 and 400406012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400406329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200203014 + 200203015.

It is an arithmetic number, because the mean of its divisors is an integer number (200203015).

Almost surely, 2^400406029 is an apocalyptic number.

It is an amenable number.

400406029 is a deficient number, since it is larger than the sum of its proper divisors (1).

400406029 is an equidigital number, since it uses as much as digits as its factorization.

400406029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 400406029 is about 20010.1481503761. The cubic root of 400406029 is about 737.0555193593.

The spelling of 400406029 in words is "four hundred million, four hundred six thousand, twenty-nine".