1181426688 has 352 divisors, whose sum is σ = 3989193600. Its totient is φ = 342392832.

The previous prime is 1181426681. The next prime is 1181426699. The reversal of 1181426688 is 8866241811.

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

It is not an unprimeable number, because it can be changed into a prime (1181426681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6828970 + ... + 6829142.

Almost surely, 2^1181426688 is an apocalyptic number.

1181426688 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 1181426688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994596800).

1181426688 is an abundant number, since it is smaller than the sum of its proper divisors (2807766912).

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

1181426688 is a wasteful number, since it uses less digits than its factorization.

1181426688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 210 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1181426688 is about 34371.8880482292. Note that the first 3 decimals coincide. The cubic root of 1181426688 is about 1057.1475129226.

The spelling of 1181426688 in words is "one billion, one hundred eighty-one million, four hundred twenty-six thousand, six hundred eighty-eight".