1178633216 has 44 divisors (see below), whose sum is σ = 2394867180. Its totient is φ = 579624960.

The previous prime is 1178633201. The next prime is 1178633221. The reversal of 1178633216 is 6123368711.

It can be written as a sum of positive squares in 2 ways, for example, as 610287616 + 568345600 = 24704^2 + 23840^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1178633216.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53030 + ... + 71898.

Almost surely, 2^1178633216 is an apocalyptic number.

1178633216 is a gapful number since it is divisible by the number (16) 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 1178633216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197433590).

1178633216 is an abundant number, since it is smaller than the sum of its proper divisors (1216233964).

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

1178633216 is an equidigital number, since it uses as much as digits as its factorization.

1178633216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18950 (or 18932 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 1178633216 is about 34331.2280001750. The cubic root of 1178633216 is about 1056.3136503267.

The spelling of 1178633216 in words is "one billion, one hundred seventy-eight million, six hundred thirty-three thousand, two hundred sixteen".