400423306 has 4 divisors (see below), whose sum is σ = 600634962. Its totient is φ = 200211652.

The previous prime is 400423301. The next prime is 400423313. The reversal of 400423306 is 603324004.

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

It can be written as a sum of positive squares in only one way, i.e., 399640081 + 783225 = 19991^2 + 885^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (400423301) 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 as a sum of consecutive naturals, namely, 100105825 + ... + 100105828.

Almost surely, 2^400423306 is an apocalyptic number.

400423306 is a deficient number, since it is larger than the sum of its proper divisors (200211656).

400423306 is a wasteful number, since it uses less digits than its factorization.

400423306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200211655.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 400423306 is about 20010.5798516685. The cubic root of 400423306 is about 737.0661202029.

The spelling of 400423306 in words is "four hundred million, four hundred twenty-three thousand, three hundred six".