12288390 has 32 divisors (see below), whose sum is σ = 29691360. Its totient is φ = 3254784.

The previous prime is 12288379. The next prime is 12288391. The reversal of 12288390 is 9388221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12288391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3406 + ... + 6014.

It is an arithmetic number, because the mean of its divisors is an integer number (927855).

Almost surely, 2^12288390 is an apocalyptic number.

12288390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12288390 is an abundant number, since it is smaller than the sum of its proper divisors (17402970).

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

12288390 is a wasteful number, since it uses less digits than its factorization.

12288390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 12288390 is about 3505.4799956639. The cubic root of 12288390 is about 230.7623725312.

The spelling of 12288390 in words is "twelve million, two hundred eighty-eight thousand, three hundred ninety".