4439978 has 8 divisors (see below), whose sum is σ = 6680100. Its totient is φ = 2213280.

The previous prime is 4439971. The next prime is 4439993. The reversal of 4439978 is 8799344.

It can be written as a sum of positive squares in 2 ways, for example, as 4439449 + 529 = 2107^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 4 + 4¹¹ + 3¹¹ + 9⁴ + 9⁵ + 7⁴ + 8³ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4439971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483 + ... + 3878.

Almost surely, 2^4439978 is an apocalyptic number.

4439978 is a deficient number, since it is larger than the sum of its proper divisors (2240122).

4439978 is a wasteful number, since it uses less digits than its factorization.

4439978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712.

The product of its digits is 217728, while the sum is 44.

The square root of 4439978 is about 2107.1255301951. The cubic root of 4439978 is about 164.3590438328.

The spelling of 4439978 in words is "four million, four hundred thirty-nine thousand, nine hundred seventy-eight".