4208639 has 8 divisors (see below), whose sum is σ = 4577328. Its totient is φ = 3853440.

The previous prime is 4208629. The next prime is 4208641. The reversal of 4208639 is 9368024.

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

It is a cyclic number.

It is not a de Polignac number, because 4208639 - 2⁴ = 4208623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4208629) 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, 2717 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (572166).

Almost surely, 2^4208639 is an apocalyptic number.

4208639 is a deficient number, since it is larger than the sum of its proper divisors (368689).

4208639 is a wasteful number, since it uses less digits than its factorization.

4208639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 4208639 is about 2051.4967706531. The cubic root of 4208639 is about 161.4534111447.

The spelling of 4208639 in words is "four million, two hundred eight thousand, six hundred thirty-nine".