4440939978 has 32 divisors (see below), whose sum is σ = 8987906880. Its totient is φ = 1462665600.

The previous prime is 4440939973. The next prime is 4440939989. The reversal of 4440939978 is 8799390444.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4440939973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520976 + ... + 1523892.

It is an arithmetic number, because the mean of its divisors is an integer number (280872090).

Almost surely, 2^4440939978 is an apocalyptic number.

4440939978 is an abundant number, since it is smaller than the sum of its proper divisors (4546966902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4440939978 is a wasteful number, since it uses less digits than its factorization.

4440939978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The square root of 4440939978 is about 66640.3779851225. The cubic root of 4440939978 is about 1643.7091313833.

The spelling of 4440939978 in words is "four billion, four hundred forty million, nine hundred thirty-nine thousand, nine hundred seventy-eight".