1216614444 has 24 divisors (see below), whose sum is σ = 2845187520. Its totient is φ = 404620944.

The previous prime is 1216614433. The next prime is 1216614461. The reversal of 1216614444 is 4444166121.

It is a nude number because it is divisible by every one of its digits.

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, 109114 + ... + 119745.

It is an arithmetic number, because the mean of its divisors is an integer number (118549480).

Almost surely, 2^1216614444 is an apocalyptic number.

It is an amenable number.

1216614444 is an abundant number, since it is smaller than the sum of its proper divisors (1628573076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216614444 is a wasteful number, since it uses less digits than its factorization.

1216614444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229309 (or 229307 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 1216614444 is about 34880.0006307339. Note that the first 3 decimals coincide. The cubic root of 1216614444 is about 1067.5404080962.

The spelling of 1216614444 in words is "one billion, two hundred sixteen million, six hundred fourteen thousand, four hundred forty-four".