400104406729 has 4 divisors (see below), whose sum is σ = 423639960084. Its totient is φ = 376568853376.

The previous prime is 400104406703. The next prime is 400104406769. The reversal of 400104406729 is 927604401004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182458831104 + 217645575625 = 427152^2 + 466525^2 .

It is a cyclic number.

It is not a de Polignac number, because 400104406729 - 2¹³ = 400104398537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400104406769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11767776652 + ... + 11767776685.

It is an arithmetic number, because the mean of its divisors is an integer number (105909990021).

Almost surely, 2^400104406729 is an apocalyptic number.

It is an amenable number.

400104406729 is a deficient number, since it is larger than the sum of its proper divisors (23535553355).

400104406729 is a wasteful number, since it uses less digits than its factorization.

400104406729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23535553354.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 400104406729 in words is "four hundred billion, one hundred four million, four hundred six thousand, seven hundred twenty-nine".