8424639 has 36 divisors (see below), whose sum is σ = 13409760. Its totient is φ = 5091840.

The previous prime is 8424623. The next prime is 8424659. The reversal of 8424639 is 9364248.

It is a happy number.

It is not a de Polignac number, because 8424639 - 2⁴ = 8424623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8424659) 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 in 35 ways as a sum of consecutive naturals, for example, 106602 + ... + 106680.

Almost surely, 2^8424639 is an apocalyptic number.

8424639 is a deficient number, since it is larger than the sum of its proper divisors (4985121).

8424639 is a wasteful number, since it uses less digits than its factorization.

8424639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 140 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 8424639 is about 2902.5228681270. The cubic root of 8424639 is about 203.4778312374.

The spelling of 8424639 in words is "eight million, four hundred twenty-four thousand, six hundred thirty-nine".