12622378 has 4 divisors (see below), whose sum is σ = 18933570. Its totient is φ = 6311188.

The previous prime is 12622373. The next prime is 12622387. The reversal of 12622378 is 87322621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 1580049 = 3323^2 + 1257^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12622373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155593 + ... + 3155596.

Almost surely, 2^12622378 is an apocalyptic number.

12622378 is a deficient number, since it is larger than the sum of its proper divisors (6311192).

12622378 is an equidigital number, since it uses as much as digits as its factorization.

12622378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311191.

The product of its digits is 8064, while the sum is 31.

The square root of 12622378 is about 3552.7986151765. The cubic root of 12622378 is about 232.8343545660.

Adding to 12622378 its reverse (87322621), we get a palindrome (99944999).

The spelling of 12622378 in words is "twelve million, six hundred twenty-two thousand, three hundred seventy-eight".