1323172536 has 64 divisors (see below), whose sum is σ = 3791873280. Its totient is φ = 376911360.

The previous prime is 1323172511. The next prime is 1323172537. The reversal of 1323172536 is 6352713231.

It is a junction number, because it is equal to n+sod(n) for n = 1323172497 and 1323172506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323172537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44931 + ... + 68301.

It is an arithmetic number, because the mean of its divisors is an integer number (59248020).

Almost surely, 2^1323172536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323172536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895936640).

1323172536 is an abundant number, since it is smaller than the sum of its proper divisors (2468700744).

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

1323172536 is a wasteful number, since it uses less digits than its factorization.

1323172536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23724 (or 23720 counting only the distinct ones).

The product of its digits is 22680, while the sum is 33.

The square root of 1323172536 is about 36375.4386365306. The cubic root of 1323172536 is about 1097.8394329257.

Adding to 1323172536 its reverse (6352713231), we get a palindrome (7675885767).

The spelling of 1323172536 in words is "one billion, three hundred twenty-three million, one hundred seventy-two thousand, five hundred thirty-six".