648422 has 4 divisors (see below), whose sum is σ = 972636. Its totient is φ = 324210.

The previous prime is 648391. The next prime is 648433. The reversal of 648422 is 224846.

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 = 648391 and 648400.

It is a congruent number.

It is an unprimeable number.

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, 162104 + ... + 162107.

It is an arithmetic number, because the mean of its divisors is an integer number (243159).

2⁶⁴⁸⁴²² is an apocalyptic number.

648422 is a deficient number, since it is larger than the sum of its proper divisors (324214).

648422 is a wasteful number, since it uses less digits than its factorization.

648422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324213.

The product of its digits is 3072, while the sum is 26.

The square root of 648422 is about 805.2465460963. The cubic root of 648422 is about 86.5537549977.

The spelling of 648422 in words is "six hundred forty-eight thousand, four hundred twenty-two".