33643228 has 12 divisors (see below), whose sum is σ = 58929472. Its totient is φ = 16806240.

The previous prime is 33643217. The next prime is 33643231. The reversal of 33643228 is 82234633.

It is a super-4 number, since 4×33643228⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 33643228.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 2101 + ... + 8467.

Almost surely, 2^33643228 is an apocalyptic number.

It is an amenable number.

33643228 is a deficient number, since it is larger than the sum of its proper divisors (25286244).

33643228 is a wasteful number, since it uses less digits than its factorization.

33643228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692 (or 7690 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 33643228 is about 5800.2782691867. The cubic root of 33643228 is about 322.8240534205.

The spelling of 33643228 in words is "thirty-three million, six hundred forty-three thousand, two hundred twenty-eight".