400008844 has 24 divisors (see below), whose sum is σ = 742352688. Its totient is φ = 187944960.

The previous prime is 400008821. The next prime is 400008853. The reversal of 400008844 is 448800004.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 42732 + ... + 51244.

It is an arithmetic number, because the mean of its divisors is an integer number (30931362).

Almost surely, 2^400008844 is an apocalyptic number.

It is an amenable number.

400008844 is a deficient number, since it is larger than the sum of its proper divisors (342343844).

400008844 is a wasteful number, since it uses less digits than its factorization.

400008844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225 (or 9223 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 400008844 is about 20000.2210987779. The cubic root of 400008844 is about 736.8117299505.

Adding to 400008844 its reverse (448800004), we get a palindrome (848808848).

The spelling of 400008844 in words is "four hundred million, eight thousand, eight hundred forty-four".