1216116330 has 128 divisors (see below), whose sum is σ = 3480938496. Its totient is φ = 268012800.

The previous prime is 1216116289. The next prime is 1216116347. The reversal of 1216116330 is 336116121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216116330.

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, 285315 + ... + 289545.

It is an arithmetic number, because the mean of its divisors is an integer number (27194832).

Almost surely, 2^1216116330 is an apocalyptic number.

1216116330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216116330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740469248).

1216116330 is an abundant number, since it is smaller than the sum of its proper divisors (2264822166).

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

1216116330 is a wasteful number, since it uses less digits than its factorization.

1216116330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1216116330 is about 34872.8595042047. The cubic root of 1216116330 is about 1067.3946951539.

The spelling of 1216116330 in words is "one billion, two hundred sixteen million, one hundred sixteen thousand, three hundred thirty".