636834 has 16 divisors (see below), whose sum is σ = 1389600. Its totient is φ = 192960.

The previous prime is 636829. The next prime is 636851. The reversal of 636834 is 438636.

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 7 ways as a sum of consecutive naturals, for example, 4759 + ... + 4890.

It is an arithmetic number, because the mean of its divisors is an integer number (86850).

2⁶³⁶⁸³⁴ is an apocalyptic number.

636834 is an abundant number, since it is smaller than the sum of its proper divisors (752766).

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

636834 is a wasteful number, since it uses less digits than its factorization.

636834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9665.

The product of its digits is 10368, while the sum is 30.

The square root of 636834 is about 798.0187967711. The cubic root of 636834 is about 86.0350497119.

Subtracting from 636834 its sum of digits (30), we obtain a square (636804 = 798²).

The spelling of 636834 in words is "six hundred thirty-six thousand, eight hundred thirty-four".