13244978 has 4 divisors (see below), whose sum is σ = 19867470. Its totient is φ = 6622488.

The previous prime is 13244977. The next prime is 13244981. The reversal of 13244978 is 87944231.

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., 7689529 + 5555449 = 2773^2 + 2357^2 .

It is not an unprimeable number, because it can be changed into a prime (13244971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311243 + ... + 3311246.

Almost surely, 2^13244978 is an apocalyptic number.

13244978 is a deficient number, since it is larger than the sum of its proper divisors (6622492).

13244978 is an equidigital number, since it uses as much as digits as its factorization.

13244978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6622491.

The product of its digits is 48384, while the sum is 38.

The square root of 13244978 is about 3639.3650545116. The cubic root of 13244978 is about 236.6012748870.

The spelling of 13244978 in words is "thirteen million, two hundred forty-four thousand, nine hundred seventy-eight".