636546 has 16 divisors (see below), whose sum is σ = 1281024. Its totient is φ = 210864.

The previous prime is 636541. The next prime is 636547. The reversal of 636546 is 645636.

It is not an unprimeable number, because it can be changed into a prime (636541) by changing a digit.

636546 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (80064).

2⁶³⁶⁵⁴⁶ is an apocalyptic number.

636546 is an abundant number, since it is smaller than the sum of its proper divisors (644478).

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

636546 is a wasteful number, since it uses less digits than its factorization.

636546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 12960, while the sum is 30.

The square root of 636546 is about 797.8383294879. The cubic root of 636546 is about 86.0220783408.

It can be divided in two parts, 63654 and 6, that multiplied together give a square (381924 = 618²).

The spelling of 636546 in words is "six hundred thirty-six thousand, five hundred forty-six".