12280378 has 16 divisors (see below), whose sum is σ = 20437920. Its totient is φ = 5486800.

The previous prime is 12280357. The next prime is 12280379. The reversal of 12280378 is 87308221.

It is not an unprimeable number, because it can be changed into a prime (12280379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3433 + ... + 6028.

It is an arithmetic number, because the mean of its divisors is an integer number (1277370).

Almost surely, 2^12280378 is an apocalyptic number.

12280378 is a deficient number, since it is larger than the sum of its proper divisors (8157542).

12280378 is a wasteful number, since it uses less digits than its factorization.

12280378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 12280378 is about 3504.3370271708. The cubic root of 12280378 is about 230.7122094615.

Adding to 12280378 its reverse (87308221), we get a palindrome (99588599).

The spelling of 12280378 in words is "twelve million, two hundred eighty thousand, three hundred seventy-eight".