400306012 has 36 divisors (see below), whose sum is σ = 722402800. Its totient is φ = 194052672.

The previous prime is 400306009. The next prime is 400306019. The reversal of 400306012 is 210603004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400306019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2011489 + ... + 2011687.

Almost surely, 2^400306012 is an apocalyptic number.

It is an amenable number.

400306012 is a deficient number, since it is larger than the sum of its proper divisors (322096788).

400306012 is a wasteful number, since it uses less digits than its factorization.

400306012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 400306012 is about 20007.6488373822. The cubic root of 400306012 is about 736.9941448083.

Adding to 400306012 its reverse (210603004), we get a palindrome (610909016).

The spelling of 400306012 in words is "four hundred million, three hundred six thousand, twelve".