400500044 has 12 divisors (see below), whose sum is σ = 801000144. Its totient is φ = 171642864.

The previous prime is 400500029. The next prime is 400500053. The reversal of 400500044 is 440005004.

400500044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 400499995 and 400500031.

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, 7151759 + ... + 7151814.

It is an arithmetic number, because the mean of its divisors is an integer number (66750012).

Almost surely, 2^400500044 is an apocalyptic number.

It is an amenable number.

400500044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400500044 is a wasteful number, since it uses less digits than its factorization.

400500044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14303584 (or 14303582 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 400500044 is about 20012.4971955026. The cubic root of 400500044 is about 737.1132015177.

Adding to 400500044 its reverse (440005004), we get a palindrome (840505048).

The spelling of 400500044 in words is "four hundred million, five hundred thousand, forty-four".