636746 has 16 divisors (see below), whose sum is σ = 1055808. Its totient is φ = 285600.

The previous prime is 636739. The next prime is 636749. The reversal of 636746 is 647636.

It is not an unprimeable number, because it can be changed into a prime (636749) by changing a digit.

636746 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, 2126 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (65988).

2⁶³⁶⁷⁴⁶ is an apocalyptic number.

636746 is a deficient number, since it is larger than the sum of its proper divisors (419062).

636746 is a wasteful number, since it uses less digits than its factorization.

636746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397.

The product of its digits is 18144, while the sum is 32.

The square root of 636746 is about 797.9636583204. The cubic root of 636746 is about 86.0310866524.

The spelling of 636746 in words is "six hundred thirty-six thousand, seven hundred forty-six".