4788639 has 10 divisors (see below), whose sum is σ = 7153520. Its totient is φ = 3192372.

The previous prime is 4788631. The next prime is 4788647. The reversal of 4788639 is 9368874.

It is a happy number.

4788639 is a `hidden beast` number, since 4 + 7 + 8 + 8 + 639 = 666.

It is an interprime number because it is at equal distance from previous prime (4788631) and next prime (4788647).

It is not a de Polignac number, because 4788639 - 2³ = 4788631 is a prime.

It is an Ulam number.

It is a Duffinian number.

4788639 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4788594 and 4788603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4788631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29479 + ... + 29640.

It is an arithmetic number, because the mean of its divisors is an integer number (715352).

Almost surely, 2^4788639 is an apocalyptic number.

4788639 is a deficient number, since it is larger than the sum of its proper divisors (2364881).

4788639 is an equidigital number, since it uses as much as digits as its factorization.

4788639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59131 (or 59122 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 4788639 is about 2188.2959123482. The cubic root of 4788639 is about 168.5533412763.

The spelling of 4788639 in words is "four million, seven hundred eighty-eight thousand, six hundred thirty-nine".