1213444444 has 6 divisors (see below), whose sum is σ = 2123527784. Its totient is φ = 606722220.

The previous prime is 1213444429. The next prime is 1213444447. The reversal of 1213444444 is 4444443121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213444447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151680552 + ... + 151680559.

Almost surely, 2^1213444444 is an apocalyptic number.

It is an amenable number.

1213444444 is a deficient number, since it is larger than the sum of its proper divisors (910083340).

1213444444 is a wasteful number, since it uses less digits than its factorization.

1213444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303361115 (or 303361113 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

The square root of 1213444444 is about 34834.5294786653. The cubic root of 1213444444 is about 1066.6124103045.

Adding to 1213444444 its reverse (4444443121), we get a palindrome (5657887565).

The spelling of 1213444444 in words is "one billion, two hundred thirteen million, four hundred forty-four thousand, four hundred forty-four".