33228639 has 24 divisors (see below), whose sum is σ = 49140000. Its totient is φ = 21631680.

The previous prime is 33228631. The next prime is 33228641. The reversal of 33228639 is 93682233.

It is not a de Polignac number, because 33228639 - 2³ = 33228631 is a prime.

It is a super-2 number, since 2×33228639² = 2208284899584642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33228631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95037 + ... + 95385.

It is an arithmetic number, because the mean of its divisors is an integer number (2047500).

Almost surely, 2^33228639 is an apocalyptic number.

33228639 is a deficient number, since it is larger than the sum of its proper divisors (15911361).

33228639 is a wasteful number, since it uses less digits than its factorization.

33228639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 572 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 33228639 is about 5764.4287661485. The cubic root of 33228639 is about 321.4925039390.

The spelling of 33228639 in words is "thirty-three million, two hundred twenty-eight thousand, six hundred thirty-nine".