33220280 has 32 divisors (see below), whose sum is σ = 77997600. Its totient is φ = 12710016.

The previous prime is 33220259. The next prime is 33220289. The reversal of 33220280 is 8202233.

It is a happy number.

It is a super-2 number, since 2×33220280² = 2207174006556800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17135 + ... + 18974.

It is an arithmetic number, because the mean of its divisors is an integer number (2437425).

Almost surely, 2^33220280 is an apocalyptic number.

It is an amenable number.

33220280 is an abundant number, since it is smaller than the sum of its proper divisors (44777320).

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

33220280 is a wasteful number, since it uses less digits than its factorization.

33220280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36143 (or 36139 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 33220280 is about 5763.7036703842. The cubic root of 33220280 is about 321.4655434485.

The spelling of 33220280 in words is "thirty-three million, two hundred twenty thousand, two hundred eighty".