8426639 has 8 divisors (see below), whose sum is σ = 9320640. Its totient is φ = 7567776.

The previous prime is 8426603. The next prime is 8426641. The reversal of 8426639 is 9366248.

8426639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8426639 - 2¹² = 8422543 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 (8426669) 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, 8279 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1165080).

Almost surely, 2^8426639 is an apocalyptic number.

8426639 is a deficient number, since it is larger than the sum of its proper divisors (894001).

8426639 is a wasteful number, since it uses less digits than its factorization.

8426639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17569.

The product of its digits is 62208, while the sum is 38.

The square root of 8426639 is about 2902.8673755444. The cubic root of 8426639 is about 203.4939317675.

The spelling of 8426639 in words is "eight million, four hundred twenty-six thousand, six hundred thirty-nine".