12320736 has 24 divisors (see below), whose sum is σ = 32342184. Its totient is φ = 4106880.

The previous prime is 12320731. The next prime is 12320743. The reversal of 12320736 is 63702321.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64075 + ... + 64266.

It is an arithmetic number, because the mean of its divisors is an integer number (1347591).

Almost surely, 2^12320736 is an apocalyptic number.

12320736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12320736 is an abundant number, since it is smaller than the sum of its proper divisors (20021448).

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

12320736 is a wasteful number, since it uses less digits than its factorization.

12320736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128354 (or 128346 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 12320736 is about 3510.0905971214. The cubic root of 12320736 is about 230.9646691716.

The spelling of 12320736 in words is "twelve million, three hundred twenty thousand, seven hundred thirty-six".