4857639 has 16 divisors (see below), whose sum is σ = 6738144. Its totient is φ = 3110400.

The previous prime is 4857637. The next prime is 4857649. The reversal of 4857639 is 9367584.

It is a happy number.

4857639 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4857639 - 2¹ = 4857637 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4857639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4857637) 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, 8709 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (421134).

Almost surely, 2^4857639 is an apocalyptic number.

4857639 is a deficient number, since it is larger than the sum of its proper divisors (1880505).

4857639 is a wasteful number, since it uses less digits than its factorization.

4857639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658.

The product of its digits is 181440, while the sum is 42.

The square root of 4857639 is about 2204.0052177797. The cubic root of 4857639 is about 169.3590512980.

It can be divided in two parts, 48 and 57639, that multiplied together give a palindrome (2766672).

The spelling of 4857639 in words is "four million, eight hundred fifty-seven thousand, six hundred thirty-nine".