648039 has 8 divisors (see below), whose sum is σ = 987520. Its totient is φ = 370296.

The previous prime is 648029. The next prime is 648041. The reversal of 648039 is 930846.

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

It is not a de Polignac number, because 648039 - 2⁵ = 648007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647997 and 648015.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648039.

It is not an unprimeable number, because it can be changed into a prime (648019) 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, 15409 + ... + 15450.

It is an arithmetic number, because the mean of its divisors is an integer number (123440).

2⁶⁴⁸⁰³⁹ is an apocalyptic number.

648039 is a deficient number, since it is larger than the sum of its proper divisors (339481).

648039 is a wasteful number, since it uses less digits than its factorization.

648039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30869.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 648039 is about 805.0086956052. The cubic root of 648039 is about 86.5367102248.

The spelling of 648039 in words is "six hundred forty-eight thousand, thirty-nine".