1181381232 has 40 divisors (see below), whose sum is σ = 3150353920. Its totient is φ = 381090240.

The previous prime is 1181381219. The next prime is 1181381233. The reversal of 1181381232 is 2321831811.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1181381232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181381233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395482 + ... + 398457.

It is an arithmetic number, because the mean of its divisors is an integer number (78758848).

Almost surely, 2^1181381232 is an apocalyptic number.

1181381232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1181381232 is an abundant number, since it is smaller than the sum of its proper divisors (1968972688).

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

1181381232 is a wasteful number, since it uses less digits than its factorization.

1181381232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793981 (or 793975 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 1181381232 is about 34371.2268038253. The cubic root of 1181381232 is about 1057.1339546504.

The spelling of 1181381232 in words is "one billion, one hundred eighty-one million, three hundred eighty-one thousand, two hundred thirty-two".