648022 has 4 divisors (see below), whose sum is σ = 972036. Its totient is φ = 324010.

The previous prime is 648019. The next prime is 648029. The reversal of 648022 is 220846.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 647984 and 648002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648029) 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 as a sum of consecutive naturals, namely, 162004 + ... + 162007.

It is an arithmetic number, because the mean of its divisors is an integer number (243009).

2⁶⁴⁸⁰²² is an apocalyptic number.

648022 is a deficient number, since it is larger than the sum of its proper divisors (324014).

648022 is a wasteful number, since it uses less digits than its factorization.

648022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324013.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 648022 is about 804.9981366438. The cubic root of 648022 is about 86.5359535126.

Adding to 648022 its reverse (220846), we get a palindrome (868868).

The spelling of 648022 in words is "six hundred forty-eight thousand, twenty-two".