400012112 has 40 divisors (see below), whose sum is σ = 795580032. Its totient is φ = 194745600.

The previous prime is 400012103. The next prime is 400012163. The reversal of 400012112 is 211210004.

It is a junction number, because it is equal to n+sod(n) for n = 400012093 and 400012102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157412 + ... + 159932.

Almost surely, 2^400012112 is an apocalyptic number.

It is an amenable number.

400012112 is a deficient number, since it is larger than the sum of its proper divisors (395567920).

400012112 is a wasteful number, since it uses less digits than its factorization.

400012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 400012112 is about 20000.3027977078. The cubic root of 400012112 is about 736.8137364846.

Adding to 400012112 its reverse (211210004), we get a palindrome (611222116).

The spelling of 400012112 in words is "four hundred million, twelve thousand, one hundred twelve".