4639864 has 8 divisors (see below), whose sum is σ = 8699760. Its totient is φ = 2319928.

The previous prime is 4639853. The next prime is 4639867. The reversal of 4639864 is 4689364.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4639867) 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 as a sum of consecutive naturals, namely, 289984 + ... + 289999.

It is an arithmetic number, because the mean of its divisors is an integer number (1087470).

Almost surely, 2^4639864 is an apocalyptic number.

It is an amenable number.

4639864 is a deficient number, since it is larger than the sum of its proper divisors (4059896).

4639864 is a wasteful number, since it uses less digits than its factorization.

4639864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579989 (or 579985 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 4639864 is about 2154.0343544150. The cubic root of 4639864 is about 166.7893887247.

The spelling of 4639864 in words is "four million, six hundred thirty-nine thousand, eight hundred sixty-four".