4778985 has 16 divisors (see below), whose sum is σ = 7689600. Its totient is φ = 2534400.

The previous prime is 4778981. The next prime is 4778993. The reversal of 4778985 is 5898774.

It is not a de Polignac number, because 4778985 - 2² = 4778981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778981) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2185 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (480600).

Almost surely, 2^4778985 is an apocalyptic number.

It is an amenable number.

4778985 is a deficient number, since it is larger than the sum of its proper divisors (2910615).

4778985 is a wasteful number, since it uses less digits than its factorization.

4778985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808.

The product of its digits is 564480, while the sum is 48.

The square root of 4778985 is about 2186.0889734867. The cubic root of 4778985 is about 168.4399960103.

It can be divided in two parts, 47789 and 85, that added together give a palindrome (47874).

The spelling of 4778985 in words is "four million, seven hundred seventy-eight thousand, nine hundred eighty-five".