4453978 has 4 divisors (see below), whose sum is σ = 6680970. Its totient is φ = 2226988.

The previous prime is 4453963. The next prime is 4453991. The reversal of 4453978 is 8793544.

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., 2474329 + 1979649 = 1573^2 + 1407^2 .

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 d-powerful number, because it can be written as 4⁶ + 4¹¹ + 5⁷ + 3⁵ + 9⁵ + 7⁶ + 8³ .

It is a self number, because there is not a number n which added to its sum of digits gives 4453978.

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, 1113493 + ... + 1113496.

Almost surely, 2^4453978 is an apocalyptic number.

4453978 is a deficient number, since it is larger than the sum of its proper divisors (2226992).

4453978 is a wasteful number, since it uses less digits than its factorization.

4453978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226991.

The product of its digits is 120960, while the sum is 40.

The square root of 4453978 is about 2110.4449767762. Note that the first 3 decimals coincide. The cubic root of 4453978 is about 164.5316131813.

The spelling of 4453978 in words is "four million, four hundred fifty-three thousand, nine hundred seventy-eight".