400244126405 has 8 divisors (see below), whose sum is σ = 482390302200. Its totient is φ = 318797067456.

The previous prime is 400244126369. The next prime is 400244126437. The reversal of 400244126405 is 504621442004.

It can be written as a sum of positive squares in 4 ways, for example, as 120579784516 + 279664341889 = 347246^2 + 528833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400244126405 - 2⁶ = 400244126341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174777950 + ... + 174780239.

It is an arithmetic number, because the mean of its divisors is an integer number (60298787775).

Almost surely, 2^400244126405 is an apocalyptic number.

It is an amenable number.

400244126405 is a deficient number, since it is larger than the sum of its proper divisors (82146175795).

400244126405 is a wasteful number, since it uses less digits than its factorization.

400244126405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349558423.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 400244126405 its reverse (504621442004), we get a palindrome (904865568409).

The spelling of 400244126405 in words is "four hundred billion, two hundred forty-four million, one hundred twenty-six thousand, four hundred five".