400423312 has 20 divisors (see below), whose sum is σ = 778918896. Its totient is φ = 199412000.

The previous prime is 400423301. The next prime is 400423313. The reversal of 400423312 is 213324004.

It is a self number, because there is not a number n which added to its sum of digits gives 400423312.

It is not an unprimeable number, because it can be changed into a prime (400423313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45838 + ... + 53869.

Almost surely, 2^400423312 is an apocalyptic number.

It is an amenable number.

400423312 is a deficient number, since it is larger than the sum of its proper divisors (378495584).

400423312 is a wasteful number, since it uses less digits than its factorization.

400423312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99966 (or 99960 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400423312 is about 20010.5800015892. The cubic root of 400423312 is about 737.0661238843.

Adding to 400423312 its reverse (213324004), we get a palindrome (613747316).

The spelling of 400423312 in words is "four hundred million, four hundred twenty-three thousand, three hundred twelve".