33424220 has 12 divisors (see below), whose sum is σ = 70190904. Its totient is φ = 13369680.

The previous prime is 33424213. The next prime is 33424229. The reversal of 33424220 is 2242433.

It is a super-2 number, since 2×33424220² = 2234356965216800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1671211 = 33424220 / (3 + 3 + 4 + 2 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 33424192 and 33424201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33424229) 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, 835586 + ... + 835625.

It is an arithmetic number, because the mean of its divisors is an integer number (5849242).

Almost surely, 2^33424220 is an apocalyptic number.

It is an amenable number.

33424220 is an abundant number, since it is smaller than the sum of its proper divisors (36766684).

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

33424220 is a wasteful number, since it uses less digits than its factorization.

33424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671220 (or 1671218 counting only the distinct ones).

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

The square root of 33424220 is about 5781.3683501400. The cubic root of 33424220 is about 322.1220297996.

Adding to 33424220 its reverse (2242433), we get a palindrome (35666653).

The spelling of 33424220 in words is "thirty-three million, four hundred twenty-four thousand, two hundred twenty".