648238 has 4 divisors (see below), whose sum is σ = 972360. Its totient is φ = 324118.

The previous prime is 648229. The next prime is 648239. The reversal of 648238 is 832846.

It is a happy number.

648238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162058 + ... + 162061.

It is an arithmetic number, because the mean of its divisors is an integer number (243090).

2⁶⁴⁸²³⁸ is an apocalyptic number.

648238 is a deficient number, since it is larger than the sum of its proper divisors (324122).

648238 is a wasteful number, since it uses less digits than its factorization.

648238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324121.

The product of its digits is 9216, while the sum is 31.

The square root of 648238 is about 805.1322872671. The cubic root of 648238 is about 86.5455672241.

The spelling of 648238 in words is "six hundred forty-eight thousand, two hundred thirty-eight".