12403378 has 16 divisors (see below), whose sum is σ = 20416536. Its totient is φ = 5616000.

The previous prime is 12403351. The next prime is 12403381. The reversal of 12403378 is 87330421.

12403378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7879249 + 4524129 = 2807^2 + 2127^2 .

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, 3123 + ... + 5878.

Almost surely, 2^12403378 is an apocalyptic number.

12403378 is a deficient number, since it is larger than the sum of its proper divisors (8013158).

12403378 is a wasteful number, since it uses less digits than its factorization.

12403378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 12403378 is about 3521.8429834392. The cubic root of 12403378 is about 231.4799215062.

Adding to 12403378 its reverse (87330421), we get a palindrome (99733799).

The spelling of 12403378 in words is "twelve million, four hundred three thousand, three hundred seventy-eight".