1123444405 has 8 divisors (see below), whose sum is σ = 1427435352. Its totient is φ = 845887488.

The previous prime is 1123444373. The next prime is 1123444423. The reversal of 1123444405 is 5044443211.

It can be written as a sum of positive squares in 4 ways, for example, as 223024356 + 900420049 = 14934^2 + 30007^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1123444405 - 2⁵ = 1123444373 is a prime.

It is a super-2 number, since 2×1123444405² = 2524254662251608050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 6608412 + ... + 6608581.

It is an arithmetic number, because the mean of its divisors is an integer number (178429419).

Almost surely, 2^1123444405 is an apocalyptic number.

It is an amenable number.

1123444405 is a deficient number, since it is larger than the sum of its proper divisors (303990947).

1123444405 is a wasteful number, since it uses less digits than its factorization.

1123444405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217015.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1123444405 is about 33517.8221995404. The cubic root of 1123444405 is about 1039.5623173686.

Adding to 1123444405 its reverse (5044443211), we get a palindrome (6167887616).

The spelling of 1123444405 in words is "one billion, one hundred twenty-three million, four hundred forty-four thousand, four hundred five".