33220420 has 12 divisors (see below), whose sum is σ = 69762924. Its totient is φ = 13288160.

The previous prime is 33220393. The next prime is 33220423. The reversal of 33220420 is 2402233.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 8479744 = 4974^2 + 2912^2 .

It is a super-2 number, since 2×33220420² = 2207192609952800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33220394 and 33220403.

It is not an unprimeable number, because it can be changed into a prime (33220423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830491 + ... + 830530.

It is an arithmetic number, because the mean of its divisors is an integer number (5813577).

Almost surely, 2^33220420 is an apocalyptic number.

It is an amenable number.

33220420 is an abundant number, since it is smaller than the sum of its proper divisors (36542504).

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

33220420 is a wasteful number, since it uses less digits than its factorization.

33220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661030 (or 1661028 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 33220420 is about 5763.7158153400. The cubic root of 33220420 is about 321.4659950312.

Adding to 33220420 its reverse (2402233), we get a palindrome (35622653).

The spelling of 33220420 in words is "thirty-three million, two hundred twenty thousand, four hundred twenty".