400012012 has 12 divisors (see below), whose sum is σ = 709880976. Its totient is φ = 197188880.

The previous prime is 400012007. The next prime is 400012033. The reversal of 400012012 is 210210004.

400012012 is a modest number, since divided by 12012 gives 400 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 400012012.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 703963 + ... + 704530.

It is an arithmetic number, because the mean of its divisors is an integer number (59156748).

Almost surely, 2^400012012 is an apocalyptic number.

It is an amenable number.

400012012 is a deficient number, since it is larger than the sum of its proper divisors (309868964).

400012012 is a wasteful number, since it uses less digits than its factorization.

400012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408568 (or 1408566 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 400012012 is about 20000.3002977455. The cubic root of 400012012 is about 736.8136750853.

Adding to 400012012 its reverse (210210004), we get a palindrome (610222016).

The spelling of 400012012 in words is "four hundred million, twelve thousand, twelve".