33224240 has 80 divisors (see below), whose sum is σ = 89518080. Its totient is φ = 11232000.

The previous prime is 33224221. The next prime is 33224267. The reversal of 33224240 is 4242233.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×33224240² = 2207700247155200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43865 + ... + 44615.

It is an arithmetic number, because the mean of its divisors is an integer number (1118976).

Almost surely, 2^33224240 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 33224240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44759040).

33224240 is an abundant number, since it is smaller than the sum of its proper divisors (56293840).

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

33224240 is a wasteful number, since it uses less digits than its factorization.

33224240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 33224240 is about 5764.0471892586. The cubic root of 33224240 is about 321.4783162986.

Adding to 33224240 its reverse (4242233), we get a palindrome (37466473).

The spelling of 33224240 in words is "thirty-three million, two hundred twenty-four thousand, two hundred forty".