400313505 has 32 divisors (see below), whose sum is σ = 680990976. Its totient is φ = 200355584.

The previous prime is 400313449. The next prime is 400313519. The reversal of 400313505 is 505313004.

It is a cyclic number.

It is not a de Polignac number, because 400313505 - 2¹² = 400309409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7339 + ... + 29231.

It is an arithmetic number, because the mean of its divisors is an integer number (21280968).

Almost surely, 2^400313505 is an apocalyptic number.

It is an amenable number.

400313505 is a deficient number, since it is larger than the sum of its proper divisors (280677471).

400313505 is a wasteful number, since it uses less digits than its factorization.

400313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21977.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 400313505 is about 20007.8360898924. The cubic root of 400313505 is about 736.9987431760.

Adding to 400313505 its reverse (505313004), we get a palindrome (905626509).

The spelling of 400313505 in words is "four hundred million, three hundred thirteen thousand, five hundred five".