12320730 has 24 divisors (see below), whose sum is σ = 32034132. Its totient is φ = 3285504.

The previous prime is 12320713. The next prime is 12320731. The reversal of 12320730 is 3702321.

It can be written as a sum of positive squares in 2 ways, for example, as 11840481 + 480249 = 3441^2 + 693^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12320731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68359 + ... + 68538.

Almost surely, 2^12320730 is an apocalyptic number.

12320730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12320730 is an abundant number, since it is smaller than the sum of its proper divisors (19713402).

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

12320730 is a wasteful number, since it uses less digits than its factorization.

12320730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136910 (or 136907 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 12320730 is about 3510.0897424425. The cubic root of 12320730 is about 230.9646316796.

The spelling of 12320730 in words is "twelve million, three hundred twenty thousand, seven hundred thirty".