33686228 has 6 divisors (see below), whose sum is σ = 58950906. Its totient is φ = 16843112.

The previous prime is 33686209. The next prime is 33686239. The reversal of 33686228 is 82268633.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 13454224 = 4498^2 + 3668^2 .

It is a super-2 number, since 2×33686228² = 2269523913735968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33686191 and 33686200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210775 + ... + 4210782.

It is an arithmetic number, because the mean of its divisors is an integer number (9825151).

Almost surely, 2^33686228 is an apocalyptic number.

It is an amenable number.

33686228 is a deficient number, since it is larger than the sum of its proper divisors (25264678).

33686228 is a wasteful number, since it uses less digits than its factorization.

33686228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421561 (or 8421559 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 33686228 is about 5803.9838042503. The cubic root of 33686228 is about 322.9615305621.

The spelling of 33686228 in words is "thirty-three million, six hundred eighty-six thousand, two hundred twenty-eight".