12270778 has 16 divisors (see below), whose sum is σ = 19879776. Its totient is φ = 5646960.

The previous prime is 12270763. The next prime is 12270871. The reversal of 12270778 is 87707221.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17413 + ... + 18103.

It is an arithmetic number, because the mean of its divisors is an integer number (1242486).

Almost surely, 2^12270778 is an apocalyptic number.

12270778 is a deficient number, since it is larger than the sum of its proper divisors (7608998).

12270778 is a wasteful number, since it uses less digits than its factorization.

12270778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 12270778 is about 3502.9670281063. The cubic root of 12270778 is about 230.6520751942.

Adding to 12270778 its reverse (87707221), we get a palindrome (99977999).

The spelling of 12270778 in words is "twelve million, two hundred seventy thousand, seven hundred seventy-eight".