648902 has 4 divisors (see below), whose sum is σ = 973356. Its totient is φ = 324450.

The previous prime is 648889. The next prime is 648911. The reversal of 648902 is 209846.

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

It is a congruent number.

It is an unprimeable number.

648902 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 162224 + ... + 162227.

It is an arithmetic number, because the mean of its divisors is an integer number (243339).

2⁶⁴⁸⁹⁰² is an apocalyptic number.

648902 is a deficient number, since it is larger than the sum of its proper divisors (324454).

648902 is a wasteful number, since it uses less digits than its factorization.

648902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324453.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 648902 is about 805.5445363231. The cubic root of 648902 is about 86.5751071187.

The spelling of 648902 in words is "six hundred forty-eight thousand, nine hundred two".