400343105 has 4 divisors (see below), whose sum is σ = 480411732. Its totient is φ = 320274480.

The previous prime is 400343101. The next prime is 400343117. The reversal of 400343105 is 501343004.

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 89737729 + 310605376 = 9473^2 + 17624^2 .

It is not a de Polignac number, because 400343105 - 2² = 400343101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400343101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40034306 + ... + 40034315.

It is an arithmetic number, because the mean of its divisors is an integer number (120102933).

Almost surely, 2^400343105 is an apocalyptic number.

It is an amenable number.

400343105 is a deficient number, since it is larger than the sum of its proper divisors (80068627).

400343105 is an equidigital number, since it uses as much as digits as its factorization.

400343105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80068626.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 400343105 is about 20008.5757863972. The cubic root of 400343105 is about 737.0169077935.

Adding to 400343105 its reverse (501343004), we get a palindrome (901686109).

The spelling of 400343105 in words is "four hundred million, three hundred forty-three thousand, one hundred five".