635706 has 12 divisors (see below), whose sum is σ = 1377402. Its totient is φ = 211896.

The previous prime is 635689. The next prime is 635707. The reversal of 635706 is 607536.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 95481 = 735^2 + 309^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 635706.

It is not an unprimeable number, because it can be changed into a prime (635707) by changing a digit.

635706 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 5 ways as a sum of consecutive naturals, for example, 17641 + ... + 17676.

2⁶³⁵⁷⁰⁶ is an apocalyptic number.

635706 is an abundant number, since it is smaller than the sum of its proper divisors (741696).

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

635706 is a wasteful number, since it uses less digits than its factorization.

635706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35325 (or 35322 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 635706 is about 797.3117332637. The cubic root of 635706 is about 85.9842228134.

The spelling of 635706 in words is "six hundred thirty-five thousand, seven hundred six".