1216395360 has 288 divisors, whose sum is σ = 4414163040. Its totient is φ = 312837120.

The previous prime is 1216395347. The next prime is 1216395403. The reversal of 1216395360 is 635936121.

1216395360 is a `hidden beast` number, since 12 + 1 + 639 + 5 + 3 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4151374 + ... + 4151666.

It is an arithmetic number, because the mean of its divisors is an integer number (15326955).

Almost surely, 2^1216395360 is an apocalyptic number.

1216395360 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 1216395360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207081520).

1216395360 is an abundant number, since it is smaller than the sum of its proper divisors (3197767680).

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

1216395360 is a wasteful number, since it uses less digits than its factorization.

1216395360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 1216395360 is about 34876.8599504026. The cubic root of 1216395360 is about 1067.4763245064.

The spelling of 1216395360 in words is "one billion, two hundred sixteen million, three hundred ninety-five thousand, three hundred sixty".