1232365640 has 96 divisors (see below), whose sum is σ = 3079210680. Its totient is φ = 443520000.

The previous prime is 1232365637. The next prime is 1232365679. The reversal of 1232365640 is 465632321.

It can be written as a sum of positive squares in 4 ways, for example, as 896523364 + 335842276 = 29942^2 + 18326^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1232365597 and 1232365606.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487580 + ... + 490100.

Almost surely, 2^1232365640 is an apocalyptic number.

1232365640 is a gapful number since it is divisible by the number (10) 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 1232365640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539605340).

1232365640 is an abundant number, since it is smaller than the sum of its proper divisors (1846845040).

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

1232365640 is a wasteful number, since it uses less digits than its factorization.

1232365640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2640 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1232365640 is about 35105.0657313158. The cubic root of 1232365640 is about 1072.1277252766.

Adding to 1232365640 its reverse (465632321), we get a palindrome (1697997961).

The spelling of 1232365640 in words is "one billion, two hundred thirty-two million, three hundred sixty-five thousand, six hundred forty".