1005223444 has 12 divisors (see below), whose sum is σ = 1762396468. Its totient is φ = 501681600.

The previous prime is 1005223421. The next prime is 1005223477. The reversal of 1005223444 is 4443225001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 475763344 + 529460100 = 21812^2 + 23010^2 .

It is a super-2 number, since 2×1005223444² = 2020948344734442272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230097 + ... + 234424.

Almost surely, 2^1005223444 is an apocalyptic number.

It is an amenable number.

1005223444 is a deficient number, since it is larger than the sum of its proper divisors (757173024).

1005223444 is a wasteful number, since it uses less digits than its factorization.

1005223444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465066 (or 465064 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1005223444 is about 31705.2589328647. The cubic root of 1005223444 is about 1001.7381251706.

Adding to 1005223444 its reverse (4443225001), we get a palindrome (5448448445).

The spelling of 1005223444 in words is "one billion, five million, two hundred twenty-three thousand, four hundred forty-four".