634198 has 16 divisors (see below), whose sum is σ = 1005696. Its totient is φ = 299520.

The previous prime is 634187. The next prime is 634199. The reversal of 634198 is 891436.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634199) by changing a digit.

634198 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 in 7 ways as a sum of consecutive naturals, for example, 3190 + ... + 3382.

It is an arithmetic number, because the mean of its divisors is an integer number (62856).

2⁶³⁴¹⁹⁸ is an apocalyptic number.

634198 is a deficient number, since it is larger than the sum of its proper divisors (371498).

634198 is a wasteful number, since it uses less digits than its factorization.

634198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its digits is 5184, while the sum is 31.

The square root of 634198 is about 796.3654939787. The cubic root of 634198 is about 85.9161793721.

The spelling of 634198 in words is "six hundred thirty-four thousand, one hundred ninety-eight".