1181989008 has 60 divisors (see below), whose sum is σ = 3364018320. Its totient is φ = 387315648.

The previous prime is 1181989007. The next prime is 1181989019. The reversal of 1181989008 is 8009891811.

It is not an unprimeable number, because it can be changed into a prime (1181989001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61066 + ... + 78057.

It is an arithmetic number, because the mean of its divisors is an integer number (56066972).

Almost surely, 2^1181989008 is an apocalyptic number.

1181989008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1181989008 is an abundant number, since it is smaller than the sum of its proper divisors (2182029312).

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

1181989008 is a wasteful number, since it uses less digits than its factorization.

1181989008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139196 (or 139187 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The square root of 1181989008 is about 34380.0670156415. The cubic root of 1181989008 is about 1057.3152087282.

The spelling of 1181989008 in words is "one billion, one hundred eighty-one million, nine hundred eighty-nine thousand, eight".