648489 has 16 divisors (see below), whose sum is σ = 942080. Its totient is φ = 395280.

The previous prime is 648481. The next prime is 648509. The reversal of 648489 is 984846.

648489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648489 - 2³ = 648481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1584 + ... + 1950.

It is an arithmetic number, because the mean of its divisors is an integer number (58880).

2⁶⁴⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

648489 is a deficient number, since it is larger than the sum of its proper divisors (293591).

648489 is a wasteful number, since it uses less digits than its factorization.

648489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its digits is 55296, while the sum is 39.

The square root of 648489 is about 805.2881471871. The cubic root of 648489 is about 86.5567360305.

The spelling of 648489 in words is "six hundred forty-eight thousand, four hundred eighty-nine".