400440422 has 8 divisors (see below), whose sum is σ = 601026816. Its totient is φ = 200098152.

The previous prime is 400440421. The next prime is 400440427. The reversal of 400440422 is 224044004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 400440394 and 400440403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400440421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56873 + ... + 63524.

It is an arithmetic number, because the mean of its divisors is an integer number (75128352).

Almost surely, 2^400440422 is an apocalyptic number.

400440422 is a deficient number, since it is larger than the sum of its proper divisors (200586394).

400440422 is a wasteful number, since it uses less digits than its factorization.

400440422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122062.

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

The square root of 400440422 is about 20011.0075208621. The cubic root of 400440422 is about 737.0766219592.

Adding to 400440422 its reverse (224044004), we get a palindrome (624484426).

The spelling of 400440422 in words is "four hundred million, four hundred forty thousand, four hundred twenty-two".