33423220 has 12 divisors (see below), whose sum is σ = 70188804. Its totient is φ = 13369280.

The previous prime is 33423197. The next prime is 33423227. The reversal of 33423220 is 2232433.

It can be written as a sum of positive squares in 2 ways, for example, as 22638564 + 10784656 = 4758^2 + 3284^2 .

It is a super-2 number, since 2×33423220² = 2234223270336800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33423227) 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, 835561 + ... + 835600.

It is an arithmetic number, because the mean of its divisors is an integer number (5849067).

Almost surely, 2^33423220 is an apocalyptic number.

It is an amenable number.

33423220 is an abundant number, since it is smaller than the sum of its proper divisors (36765584).

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

33423220 is a wasteful number, since it uses less digits than its factorization.

33423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671170 (or 1671168 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 33423220 is about 5781.2818647770. The cubic root of 33423220 is about 322.1188173063.

Adding to 33423220 its reverse (2232433), we get a palindrome (35655653).

The spelling of 33423220 in words is "thirty-three million, four hundred twenty-three thousand, two hundred twenty".