400304105 has 4 divisors (see below), whose sum is σ = 480364932. Its totient is φ = 320243280.

The previous prime is 400304077. The next prime is 400304129. The reversal of 400304105 is 501403004.

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 206899456 + 193404649 = 14384^2 + 13907^2 .

It is not a de Polignac number, because 400304105 - 2²⁰ = 399255529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40030406 + ... + 40030415.

It is an arithmetic number, because the mean of its divisors is an integer number (120091233).

Almost surely, 2^400304105 is an apocalyptic number.

It is an amenable number.

400304105 is a deficient number, since it is larger than the sum of its proper divisors (80060827).

400304105 is an equidigital number, since it uses as much as digits as its factorization.

400304105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80060826.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400304105 is about 20007.6011805514. The cubic root of 400304105 is about 736.9929744953.

Adding to 400304105 its reverse (501403004), we get a palindrome (901707109).

The spelling of 400304105 in words is "four hundred million, three hundred four thousand, one hundred five".