400043312 has 20 divisors (see below), whose sum is σ = 775418376. Its totient is φ = 199935360.

The previous prime is 400043299. The next prime is 400043327. The reversal of 400043312 is 213340004.

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, 50228 + ... + 57644.

Almost surely, 2^400043312 is an apocalyptic number.

It is an amenable number.

400043312 is a deficient number, since it is larger than the sum of its proper divisors (375375064).

400043312 is a wasteful number, since it uses less digits than its factorization.

400043312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10796 (or 10790 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400043312 is about 20001.0827706902. The cubic root of 400043312 is about 736.8328925637.

Adding to 400043312 its reverse (213340004), we get a palindrome (613383316).

The spelling of 400043312 in words is "four hundred million, forty-three thousand, three hundred twelve".