33099228 has 18 divisors (see below), whose sum is σ = 83667584. Its totient is φ = 11033064.

The previous prime is 33099223. The next prime is 33099229. The reversal of 33099228 is 82299033.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 919423 = 33099228 / (3 + 3 + 0 + 9 + 9 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 33099192 and 33099201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33099223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459676 + ... + 459747.

Almost surely, 2^33099228 is an apocalyptic number.

It is an amenable number.

33099228 is an abundant number, since it is smaller than the sum of its proper divisors (50568356).

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

33099228 is a wasteful number, since it uses less digits than its factorization.

33099228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919433 (or 919428 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 33099228 is about 5753.1928526689. The cubic root of 33099228 is about 321.0746034421.

The spelling of 33099228 in words is "thirty-three million, ninety-nine thousand, two hundred twenty-eight".