400440112 has 40 divisors (see below), whose sum is σ = 807885792. Its totient is φ = 192115200.

The previous prime is 400440109. The next prime is 400440119. The reversal of 400440112 is 211044004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (400440119) by changing a digit.

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, 35013 + ... + 45019.

Almost surely, 2^400440112 is an apocalyptic number.

It is an amenable number.

400440112 is an abundant number, since it is smaller than the sum of its proper divisors (407445680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400440112 is a wasteful number, since it uses less digits than its factorization.

400440112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117 (or 10111 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400440112 is about 20010.9997751237. Note that the first 3 decimals coincide. The cubic root of 400440112 is about 737.0764317572.

Adding to 400440112 its reverse (211044004), we get a palindrome (611484116).

The spelling of 400440112 in words is "four hundred million, four hundred forty thousand, one hundred twelve".