1216675344 has 80 divisors (see below), whose sum is σ = 3335500800. Its totient is φ = 381330048.

The previous prime is 1216675319. The next prime is 1216675357. The reversal of 1216675344 is 4435766121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55797 + ... + 74475.

It is an arithmetic number, because the mean of its divisors is an integer number (41693760).

Almost surely, 2^1216675344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216675344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667750400).

1216675344 is an abundant number, since it is smaller than the sum of its proper divisors (2118825456).

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

1216675344 is a wasteful number, since it uses less digits than its factorization.

1216675344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772 (or 18766 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 1216675344 is about 34880.8736129129. The cubic root of 1216675344 is about 1067.5582204022.

The spelling of 1216675344 in words is "one billion, two hundred sixteen million, six hundred seventy-five thousand, three hundred forty-four".