634698 has 24 divisors (see below), whose sum is σ = 1413828. Its totient is φ = 205632.

The previous prime is 634687. The next prime is 634703. The reversal of 634698 is 896436.

It can be written as a sum of positive squares in 2 ways, for example, as 613089 + 21609 = 783^2 + 147^2 .

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 190 + ... + 1142.

2⁶³⁴⁶⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706914).

634698 is an abundant number, since it is smaller than the sum of its proper divisors (779130).

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

634698 is a wasteful number, since it uses less digits than its factorization.

634698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 995 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 634698 is about 796.6793583368. The cubic root of 634698 is about 85.9387521360.

It can be divided in two parts, 63 and 4698, that added together give a square (4761 = 69²).

The spelling of 634698 in words is "six hundred thirty-four thousand, six hundred ninety-eight".