648198 has 12 divisors (see below), whose sum is σ = 1404468. Its totient is φ = 216060.

The previous prime is 648191. The next prime is 648199. The reversal of 648198 is 891846.

It is a happy number.

648198 is a `hidden beast` number, since 648 + 1 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17988 + ... + 18023.

It is an arithmetic number, because the mean of its divisors is an integer number (117039).

2⁶⁴⁸¹⁹⁸ is an apocalyptic number.

648198 is an abundant number, since it is smaller than the sum of its proper divisors (756270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648198 is a wasteful number, since it uses less digits than its factorization.

648198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36019 (or 36016 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 648198 is about 805.1074462455. The cubic root of 648198 is about 86.5437870683.

The spelling of 648198 in words is "six hundred forty-eight thousand, one hundred ninety-eight".