12387928 has 32 divisors (see below), whose sum is σ = 26733600. Its totient is φ = 5271552.

The previous prime is 12387887. The next prime is 12387937. The reversal of 12387928 is 82978321.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8088 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (835425).

Almost surely, 2^12387928 is an apocalyptic number.

It is an amenable number.

12387928 is an abundant number, since it is smaller than the sum of its proper divisors (14345672).

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

12387928 is a wasteful number, since it uses less digits than its factorization.

12387928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579 (or 1575 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 12387928 is about 3519.6488461209. The cubic root of 12387928 is about 231.3837689163.

The spelling of 12387928 in words is "twelve million, three hundred eighty-seven thousand, nine hundred twenty-eight".