4450639 has 4 divisors (see below), whose sum is σ = 4594240. Its totient is φ = 4307040.

The previous prime is 4450637. The next prime is 4450657. The reversal of 4450639 is 9360544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4450639 - 2¹ = 4450637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 143569 = 4450639 / (4 + 4 + 5 + 0 + 6 + 3 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4450639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4450637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71754 + ... + 71815.

It is an arithmetic number, because the mean of its divisors is an integer number (1148560).

Almost surely, 2^4450639 is an apocalyptic number.

4450639 is a deficient number, since it is larger than the sum of its proper divisors (143601).

4450639 is a wasteful number, since it uses less digits than its factorization.

4450639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143600.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 4450639 is about 2109.6537630616. The cubic root of 4450639 is about 164.4904882666.

The spelling of 4450639 in words is "four million, four hundred fifty thousand, six hundred thirty-nine".