14272978 has 4 divisors (see below), whose sum is σ = 21409470. Its totient is φ = 7136488.

The previous prime is 14272969. The next prime is 14272981. The reversal of 14272978 is 87927241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87927241 = 317 ⋅277373.

It can be written as a sum of positive squares in only one way, i.e., 10220809 + 4052169 = 3197^2 + 2013^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 14272978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3568243 + ... + 3568246.

Almost surely, 2^14272978 is an apocalyptic number.

14272978 is a deficient number, since it is larger than the sum of its proper divisors (7136492).

14272978 is an equidigital number, since it uses as much as digits as its factorization.

14272978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136491.

The product of its digits is 56448, while the sum is 40.

The square root of 14272978 is about 3777.9595021652. The cubic root of 14272978 is about 242.5706203079.

The spelling of 14272978 in words is "fourteen million, two hundred seventy-two thousand, nine hundred seventy-eight".