33449220 has 96 divisors (see below), whose sum is σ = 118944000. Its totient is φ = 7644672.

The previous prime is 33449219. The next prime is 33449233. The reversal of 33449220 is 2294433.

It is a happy number.

It is a super-2 number, since 2×33449220² = 2237700637216800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 645 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (1239000).

Almost surely, 2^33449220 is an apocalyptic number.

33449220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33449220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59472000).

33449220 is an abundant number, since it is smaller than the sum of its proper divisors (85494780).

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

33449220 is a wasteful number, since it uses less digits than its factorization.

33449220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8874 (or 8866 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 33449220 is about 5783.5300638970. The cubic root of 33449220 is about 322.2023213146.

The spelling of 33449220 in words is "thirty-three million, four hundred forty-nine thousand, two hundred twenty".