1232181440 has 84 divisors (see below), whose sum is σ = 3413217456. Its totient is φ = 422456832.

The previous prime is 1232181439. The next prime is 1232181491. The reversal of 1232181440 is 441812321.

It is a super-2 number, since 2×1232181440² = 3036542202160947200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23612 + ... + 54971.

Almost surely, 2^1232181440 is an apocalyptic number.

1232181440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232181440 is an abundant number, since it is smaller than the sum of its proper divisors (2181036016).

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

1232181440 is an equidigital number, since it uses as much as digits as its factorization.

1232181440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78614 (or 78597 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1232181440 is about 35102.4420802884. The cubic root of 1232181440 is about 1072.0743061287.

Adding to 1232181440 its reverse (441812321), we get a palindrome (1673993761).

The spelling of 1232181440 in words is "one billion, two hundred thirty-two million, one hundred eighty-one thousand, four hundred forty".