400022444 has 24 divisors (see below), whose sum is σ = 741989808. Its totient is φ = 188049920.

The previous prime is 400022443. The next prime is 400022473. The reversal of 400022444 is 444220004.

It is not an unprimeable number, because it can be changed into a prime (400022443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78659 + ... + 83589.

It is an arithmetic number, because the mean of its divisors is an integer number (30916242).

Almost surely, 2^400022444 is an apocalyptic number.

It is an amenable number.

400022444 is a deficient number, since it is larger than the sum of its proper divisors (341967364).

400022444 is a wasteful number, since it uses less digits than its factorization.

400022444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145 (or 6143 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400022444 is about 20000.5610921294. The cubic root of 400022444 is about 736.8200802042.

Adding to 400022444 its reverse (444220004), we get a palindrome (844242448).

The spelling of 400022444 in words is "four hundred million, twenty-two thousand, four hundred forty-four".