1216340044 has 24 divisors (see below), whose sum is σ = 2145906000. Its totient is φ = 603236160.

The previous prime is 1216340039. The next prime is 1216340077. The reversal of 1216340044 is 4400436121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749554 + ... + 751174.

It is an arithmetic number, because the mean of its divisors is an integer number (89412750).

Almost surely, 2^1216340044 is an apocalyptic number.

It is an amenable number.

1216340044 is a deficient number, since it is larger than the sum of its proper divisors (929565956).

1216340044 is a wasteful number, since it uses less digits than its factorization.

1216340044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3031 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1216340044 is about 34876.0669227480. The cubic root of 1216340044 is about 1067.4601429760.

Adding to 1216340044 its reverse (4400436121), we get a palindrome (5616776165).

The spelling of 1216340044 in words is "one billion, two hundred sixteen million, three hundred forty thousand, forty-four".