33728227 has 4 divisors (see below), whose sum is σ = 36322720. Its totient is φ = 31133736.

The previous prime is 33728213. The next prime is 33728231. The reversal of 33728227 is 72282733.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33728227 - 2⁷ = 33728099 is a prime.

It is a super-2 number, since 2×33728227² = 2275186593127058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33728192 and 33728201.

It is not an unprimeable number, because it can be changed into a prime (33728207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297227 + ... + 1297252.

It is an arithmetic number, because the mean of its divisors is an integer number (9080680).

Almost surely, 2^33728227 is an apocalyptic number.

33728227 is a deficient number, since it is larger than the sum of its proper divisors (2594493).

33728227 is a wasteful number, since it uses less digits than its factorization.

33728227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594492.

The product of its digits is 28224, while the sum is 34.

The square root of 33728227 is about 5807.6007955093. The cubic root of 33728227 is about 323.0956944716.

The spelling of 33728227 in words is "thirty-three million, seven hundred twenty-eight thousand, two hundred twenty-seven".