400432012 has 12 divisors (see below), whose sum is σ = 700925400. Its totient is φ = 200167616.

The previous prime is 400432009. The next prime is 400432037. The reversal of 400432012 is 210234004.

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 3 ways as a sum of consecutive naturals, for example, 11739 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (58410450).

Almost surely, 2^400432012 is an apocalyptic number.

It is an amenable number.

400432012 is a deficient number, since it is larger than the sum of its proper divisors (300493388).

400432012 is a wasteful number, since it uses less digits than its factorization.

400432012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24200 (or 24198 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400432012 is about 20010.7973854117. The cubic root of 400432012 is about 737.0714619259.

Adding to 400432012 its reverse (210234004), we get a palindrome (610666016).

The spelling of 400432012 in words is "four hundred million, four hundred thirty-two thousand, twelve".