1217271328 has 192 divisors, whose sum is σ = 3175200000. Its totient is φ = 455196672.

The previous prime is 1217271313. The next prime is 1217271361. The reversal of 1217271328 is 8231727121.

It is a junction number, because it is equal to n+sod(n) for n = 1217271293 and 1217271302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2710848 + ... + 2711296.

It is an arithmetic number, because the mean of its divisors is an integer number (16537500).

Almost surely, 2^1217271328 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 1217271328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587600000).

1217271328 is an abundant number, since it is smaller than the sum of its proper divisors (1957928672).

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

1217271328 is a wasteful number, since it uses less digits than its factorization.

1217271328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 490 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 1217271328 is about 34889.4157016136. The cubic root of 1217271328 is about 1067.7325051205.

Adding to 1217271328 its reverse (8231727121), we get a palindrome (9448998449).

The spelling of 1217271328 in words is "one billion, two hundred seventeen million, two hundred seventy-one thousand, three hundred twenty-eight".