634818 has 16 divisors (see below), whose sum is σ = 1310976. Its totient is φ = 204720.

The previous prime is 634817. The next prime is 634841. The reversal of 634818 is 818436.

It is a happy number.

It is a super-3 number, since 3×634818³ = 767483331735574296, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (634817) 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 in 7 ways as a sum of consecutive naturals, for example, 1521 + ... + 1892.

It is an arithmetic number, because the mean of its divisors is an integer number (81936).

2⁶³⁴⁸¹⁸ is an apocalyptic number.

634818 is an abundant number, since it is smaller than the sum of its proper divisors (676158).

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

634818 is a wasteful number, since it uses less digits than its factorization.

634818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449.

The product of its digits is 4608, while the sum is 30.

The square root of 634818 is about 796.7546673851. The cubic root of 634818 is about 85.9441678353.

The spelling of 634818 in words is "six hundred thirty-four thousand, eight hundred eighteen".