1217304660 has 192 divisors, whose sum is σ = 4025758464. Its totient is φ = 270950400.

The previous prime is 1217304659. The next prime is 1217304677. The reversal of 1217304660 is 664037121.

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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2891250 + ... + 2891670.

It is an arithmetic number, because the mean of its divisors is an integer number (20967492).

Almost surely, 2^1217304660 is an apocalyptic number.

1217304660 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 1217304660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012879232).

1217304660 is an abundant number, since it is smaller than the sum of its proper divisors (2808453804).

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

1217304660 is a wasteful number, since it uses less digits than its factorization.

1217304660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1217304660 is about 34889.8933790288. The cubic root of 1217304660 is about 1067.7422507798.

The spelling of 1217304660 in words is "one billion, two hundred seventeen million, three hundred four thousand, six hundred sixty".