1213344404 has 24 divisors (see below), whose sum is σ = 2182290600. Its totient is φ = 589856256.

The previous prime is 1213344403. The next prime is 1213344421. The reversal of 1213344404 is 4044433121.

It can be written as a sum of positive squares in 4 ways, for example, as 53260804 + 1160083600 = 7298^2 + 34060^2 .

It is a super-3 number, since 3×1213344404³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213344403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350072 + ... + 353520.

It is an arithmetic number, because the mean of its divisors is an integer number (90928775).

Almost surely, 2^1213344404 is an apocalyptic number.

It is an amenable number.

1213344404 is a deficient number, since it is larger than the sum of its proper divisors (968946196).

1213344404 is a wasteful number, since it uses less digits than its factorization.

1213344404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867 (or 5865 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1213344404 is about 34833.0935175158. The cubic root of 1213344404 is about 1066.5830979234.

Adding to 1213344404 its reverse (4044433121), we get a palindrome (5257777525).

The spelling of 1213344404 in words is "one billion, two hundred thirteen million, three hundred forty-four thousand, four hundred four".