4639636 has 6 divisors (see below), whose sum is σ = 8119370. Its totient is φ = 2319816.

The previous prime is 4639633. The next prime is 4639643. The reversal of 4639636 is 6369364.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 2268036 = 1540^2 + 1506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4639595 and 4639604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4639631) 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, 579951 + ... + 579958.

Almost surely, 2^4639636 is an apocalyptic number.

It is an amenable number.

4639636 is a deficient number, since it is larger than the sum of its proper divisors (3479734).

4639636 is a wasteful number, since it uses less digits than its factorization.

4639636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159913 (or 1159911 counting only the distinct ones).

The product of its digits is 69984, while the sum is 37.

The square root of 4639636 is about 2153.9814298178. The cubic root of 4639636 is about 166.7866567047.

The spelling of 4639636 in words is "four million, six hundred thirty-nine thousand, six hundred thirty-six".