648398 has 4 divisors (see below), whose sum is σ = 972600. Its totient is φ = 324198.

The previous prime is 648391. The next prime is 648433. The reversal of 648398 is 893846.

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

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 648398.

It is not an unprimeable number, because it can be changed into a prime (648391) 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, 162098 + ... + 162101.

It is an arithmetic number, because the mean of its divisors is an integer number (243150).

2⁶⁴⁸³⁹⁸ is an apocalyptic number.

648398 is a deficient number, since it is larger than the sum of its proper divisors (324202).

648398 is a wasteful number, since it uses less digits than its factorization.

648398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324201.

The product of its digits is 41472, while the sum is 38.

The square root of 648398 is about 805.2316436902. The cubic root of 648398 is about 86.5526871150.

The spelling of 648398 in words is "six hundred forty-eight thousand, three hundred ninety-eight".