12309372 has 18 divisors (see below), whose sum is σ = 31115448. Its totient is φ = 4103112.

The previous prime is 12309371. The next prime is 12309379. The reversal of 12309372 is 27390321.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 170928 + ... + 170999.

It is an arithmetic number, because the mean of its divisors is an integer number (1728636).

Almost surely, 2^12309372 is an apocalyptic number.

12309372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12309372 is an abundant number, since it is smaller than the sum of its proper divisors (18806076).

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

12309372 is a wasteful number, since it uses less digits than its factorization.

12309372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341937 (or 341932 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 12309372 is about 3508.4714620473. The cubic root of 12309372 is about 230.8936374337.

Adding to 12309372 its reverse (27390321), we get a palindrome (39699693).

The spelling of 12309372 in words is "twelve million, three hundred nine thousand, three hundred seventy-two".