33330220 has 96 divisors (see below), whose sum is σ = 91155456. Its totient is φ = 9926400.

The previous prime is 33330133. The next prime is 33330247. The reversal of 33330220 is 2203333.

It is a happy number.

It is a super-2 number, since 2×33330220² = 2221807130496800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33330194 and 33330203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34950 + ... + 35890.

It is an arithmetic number, because the mean of its divisors is an integer number (949536).

Almost surely, 2^33330220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33330220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45577728).

33330220 is an abundant number, since it is smaller than the sum of its proper divisors (57825236).

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

33330220 is a wasteful number, since it uses less digits than its factorization.

33330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 16.

The square root of 33330220 is about 5773.2330630246. The cubic root of 33330220 is about 321.8197749223.

Adding to 33330220 its reverse (2203333), we get a palindrome (35533553).

The spelling of 33330220 in words is "thirty-three million, three hundred thirty thousand, two hundred twenty".