13822978 has 16 divisors (see below), whose sum is σ = 22934520. Its totient is φ = 6206976.

The previous prime is 13822967. The next prime is 13822979. The reversal of 13822978 is 87922831.

It can be written as a sum of positive squares in 4 ways, for example, as 12552849 + 1270129 = 3543^2 + 1127^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13822978.

It is not an unprimeable number, because it can be changed into a prime (13822979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6223 + ... + 8146.

Almost surely, 2^13822978 is an apocalyptic number.

13822978 is a deficient number, since it is larger than the sum of its proper divisors (9111542).

13822978 is a wasteful number, since it uses less digits than its factorization.

13822978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14421.

The product of its digits is 48384, while the sum is 40.

The square root of 13822978 is about 3717.9265727015. The cubic root of 13822978 is about 239.9940855024.

The spelling of 13822978 in words is "thirteen million, eight hundred twenty-two thousand, nine hundred seventy-eight".