4456639 has 8 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 3990360.

The previous prime is 4456631. The next prime is 4456643. The reversal of 4456639 is 9366544.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4456639 - 2³ = 4456631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4456598 and 4456607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4456631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287 + ... + 3760.

It is an arithmetic number, because the mean of its divisors is an integer number (616896).

Almost surely, 2^4456639 is an apocalyptic number.

4456639 is a deficient number, since it is larger than the sum of its proper divisors (478529).

4456639 is a wasteful number, since it uses less digits than its factorization.

4456639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125.

The product of its digits is 77760, while the sum is 37.

The square root of 4456639 is about 2111.0753184100. The cubic root of 4456639 is about 164.5643727699.

The spelling of 4456639 in words is "four million, four hundred fifty-six thousand, six hundred thirty-nine".