• 236 can be written using four 4's:

236 has 6 divisors (see below), whose sum is σ = 420. Its totient is φ = 116.

The previous prime is 233. The next prime is 239. The reversal of 236 is 632.

It is a happy number.

236 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (233) and next prime (239).

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

236 is an undulating number in base 9.

It is a plaindrome in base 7, base 10, base 12 and base 14.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26 + ... + 33.

It is an arithmetic number, because the mean of its divisors is an integer number (70).

It is an amenable number.

236 is a deficient number, since it is larger than the sum of its proper divisors (184).

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

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

The sum of its prime factors is 63 (or 61 counting only the distinct ones).

The product of its digits is 36, while the sum is 11.

The square root of 236 is about 15.3622914957. The cubic root of 236 is about 6.1797466059.

Subtracting from 236 its sum of digits (11), we obtain a square (225 = 15^{2}).

Adding to 236 its product of digits (36), we get a palindrome (272).

Adding to 236 its reverse (632), we get a palindrome (868).

The spelling of 236 in words is "two hundred thirty-six", and thus it is an aban number.

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