33228444 has 12 divisors (see below), whose sum is σ = 77533064. Its totient is φ = 11076144.

The previous prime is 33228443. The next prime is 33228457. The reversal of 33228444 is 44482233.

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

It is a super-2 number, since 2×33228444² = 2208258981322272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33228443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384507 + ... + 1384530.

Almost surely, 2^33228444 is an apocalyptic number.

It is an amenable number.

33228444 is an abundant number, since it is smaller than the sum of its proper divisors (44304620).

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

33228444 is a wasteful number, since it uses less digits than its factorization.

33228444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769044 (or 2769042 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 33228444 is about 5764.4118520453. The cubic root of 33228444 is about 321.4918750522.

The spelling of 33228444 in words is "thirty-three million, two hundred twenty-eight thousand, four hundred forty-four".