33261228 has 216 divisors, whose sum is σ = 115105536. Its totient is φ = 7862400.

The previous prime is 33261227. The next prime is 33261247. The reversal of 33261228 is 82216233.

It is a super-2 number, since 2×33261228² = 2212618576135968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33261227) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 468433 + ... + 468503.

It is an arithmetic number, because the mean of its divisors is an integer number (532896).

Almost surely, 2^33261228 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 33261228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57552768).

33261228 is an abundant number, since it is smaller than the sum of its proper divisors (81844308).

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

33261228 is a wasteful number, since it uses less digits than its factorization.

33261228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 107 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 33261228 is about 5767.2548062315. The cubic root of 33261228 is about 321.5975708957.

It can be divided in two parts, 33261 and 228, that added together give a square (33489 = 183²).

The spelling of 33261228 in words is "thirty-three million, two hundred sixty-one thousand, two hundred twenty-eight".