33628209 has 4 divisors (see below), whose sum is σ = 44837616. Its totient is φ = 22418804.

The previous prime is 33628187. The next prime is 33628213. The reversal of 33628209 is 90282633.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33628209 - 2⁸ = 33627953 is a prime.

It is a super-2 number, since 2×33628209² = 2261712881095362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33628209.

It is not an unprimeable number, because it can be changed into a prime (33628229) 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, 5604699 + ... + 5604704.

It is an arithmetic number, because the mean of its divisors is an integer number (11209404).

Almost surely, 2^33628209 is an apocalyptic number.

It is an amenable number.

33628209 is a deficient number, since it is larger than the sum of its proper divisors (11209407).

33628209 is a wasteful number, since it uses less digits than its factorization.

33628209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11209406.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 33628209 is about 5798.9834453980. The cubic root of 33628209 is about 322.7760079305.

The spelling of 33628209 in words is "thirty-three million, six hundred twenty-eight thousand, two hundred nine".