1216319160 has 256 divisors, whose sum is σ = 4406400000. Its totient is φ = 268165632.

The previous prime is 1216319129. The next prime is 1216319171. The reversal of 1216319160 is 619136121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1193131 + ... + 1194149.

It is an arithmetic number, because the mean of its divisors is an integer number (17212500).

Almost surely, 2^1216319160 is an apocalyptic number.

1216319160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216319160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2203200000).

1216319160 is an abundant number, since it is smaller than the sum of its proper divisors (3190080840).

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

1216319160 is a wasteful number, since it uses less digits than its factorization.

1216319160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1216319160 is about 34875.7675184361. The cubic root of 1216319160 is about 1067.4540336742.

The spelling of 1216319160 in words is "one billion, two hundred sixteen million, three hundred nineteen thousand, one hundred sixty".