12408778 has 8 divisors (see below), whose sum is σ = 18784260. Its totient is φ = 6147360.

The previous prime is 12408761. The next prime is 12408779. The reversal of 12408778 is 87780421.

It can be written as a sum of positive squares in 2 ways, for example, as 10975969 + 1432809 = 3313^2 + 1197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12408779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28243 + ... + 28678.

Almost surely, 2^12408778 is an apocalyptic number.

12408778 is a deficient number, since it is larger than the sum of its proper divisors (6375482).

12408778 is a wasteful number, since it uses less digits than its factorization.

12408778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57032.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 12408778 is about 3522.6095440738. The cubic root of 12408778 is about 231.5135094051.

The spelling of 12408778 in words is "twelve million, four hundred eight thousand, seven hundred seventy-eight".