400040044 has 12 divisors (see below), whose sum is σ = 706613544. Its totient is φ = 198150464.

The previous prime is 400040023. The next prime is 400040059. The reversal of 400040044 is 440040004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466909 + ... + 467764.

It is an arithmetic number, because the mean of its divisors is an integer number (58884462).

Almost surely, 2^400040044 is an apocalyptic number.

It is an amenable number.

400040044 is a deficient number, since it is larger than the sum of its proper divisors (306573500).

400040044 is a wasteful number, since it uses less digits than its factorization.

400040044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934784 (or 934782 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400040044 is about 20001.0010749462. The cubic root of 400040044 is about 736.8308861339.

Adding to 400040044 its reverse (440040004), we get a palindrome (840080048).

It can be divided in two parts, 4000 and 40044, that added together give a palindrome (44044).

The spelling of 400040044 in words is "four hundred million, forty thousand, forty-four".