400003044 has 48 divisors (see below), whose sum is σ = 1101090816. Its totient is φ = 110599200.

The previous prime is 400003033. The next prime is 400003063. The reversal of 400003044 is 440300004.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 74202 + ... + 79409.

It is an arithmetic number, because the mean of its divisors is an integer number (22939392).

Almost surely, 2^400003044 is an apocalyptic number.

It is an amenable number.

400003044 is an abundant number, since it is smaller than the sum of its proper divisors (701087772).

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

400003044 is a wasteful number, since it uses less digits than its factorization.

400003044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153656 (or 153654 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400003044 is about 20000.0760998552. The cubic root of 400003044 is about 736.8081687553.

Adding to 400003044 its reverse (440300004), we get a palindrome (840303048).

The spelling of 400003044 in words is "four hundred million, three thousand, forty-four".