8748639 has 6 divisors (see below), whose sum is σ = 12636936. Its totient is φ = 5832420.

The previous prime is 8748601. The next prime is 8748643. The reversal of 8748639 is 9368478.

It is a happy number.

8748639 is a `hidden beast` number, since 8 + 7 + 4 + 8 + 639 = 666.

It is not a de Polignac number, because 8748639 - 2¹³ = 8740447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8748594 and 8748603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8748739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486027 + ... + 486044.

It is an arithmetic number, because the mean of its divisors is an integer number (2106156).

Almost surely, 2^8748639 is an apocalyptic number.

8748639 is a deficient number, since it is larger than the sum of its proper divisors (3888297).

8748639 is a wasteful number, since it uses less digits than its factorization.

8748639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972077 (or 972074 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 8748639 is about 2957.8098316153. The cubic root of 8748639 is about 206.0535804949.

The spelling of 8748639 in words is "eight million, seven hundred forty-eight thousand, six hundred thirty-nine".