400031044 has 24 divisors (see below), whose sum is σ = 800820608. Its totient is φ = 171279360.

The previous prime is 400031041. The next prime is 400031057. The reversal of 400031044 is 440130004.

It is not an unprimeable number, because it can be changed into a prime (400031041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26089 + ... + 38479.

Almost surely, 2^400031044 is an apocalyptic number.

It is an amenable number.

400031044 is an abundant number, since it is smaller than the sum of its proper divisors (400789564).

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

400031044 is a wasteful number, since it uses less digits than its factorization.

400031044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13555 (or 13553 counting only the distinct ones).

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

The square root of 400031044 is about 20000.7760849423. The cubic root of 400031044 is about 736.8253604140.

Adding to 400031044 its reverse (440130004), we get a palindrome (840161048).

The spelling of 400031044 in words is "four hundred million, thirty-one thousand, forty-four".