1181989368 has 192 divisors, whose sum is σ = 3846679200. Its totient is φ = 335301120.

The previous prime is 1181989301. The next prime is 1181989387. The reversal of 1181989368 is 8639891811.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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, 1915396 + ... + 1916012.

Almost surely, 2^1181989368 is an apocalyptic number.

1181989368 is a gapful number since it is divisible by the number (18) 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 1181989368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923339600).

1181989368 is an abundant number, since it is smaller than the sum of its proper divisors (2664689832).

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

1181989368 is a wasteful number, since it uses less digits than its factorization.

1181989368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 810 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 1181989368 is about 34380.0722512330. The cubic root of 1181989368 is about 1057.3153160708.

The spelling of 1181989368 in words is "one billion, one hundred eighty-one million, nine hundred eighty-nine thousand, three hundred sixty-eight".