312636 has 12 divisors (see below), whose sum is σ = 729512. Its totient is φ = 104208.

The previous prime is 312623. The next prime is 312643. The reversal of 312636 is 636213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13015 + ... + 13038.

2³¹²⁶³⁶ is an apocalyptic number.

It is an amenable number.

312636 is an abundant number, since it is smaller than the sum of its proper divisors (416876).

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

312636 is a wasteful number, since it uses less digits than its factorization.

312636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26060 (or 26058 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 312636 is about 559.1386232411. The cubic root of 312636 is about 67.8702832750.

Adding to 312636 its reverse (636213), we get a palindrome (948849).

It can be divided in two parts, 31263 and 6, that multiplied together give a triangular number (187578 = T₆₁₂).

The spelling of 312636 in words is "three hundred twelve thousand, six hundred thirty-six".