33728228 has 6 divisors (see below), whose sum is σ = 59024406. Its totient is φ = 16864112.

The previous prime is 33728213. The next prime is 33728231. The reversal of 33728228 is 82282733.

It can be written as a sum of positive squares in only one way, i.e., 21603904 + 12124324 = 4648^2 + 3482^2 .

It is a super-2 number, since 2×33728228² = 2275186728039968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4216025 + ... + 4216032.

It is an arithmetic number, because the mean of its divisors is an integer number (9837401).

Almost surely, 2^33728228 is an apocalyptic number.

It is an amenable number.

33728228 is a deficient number, since it is larger than the sum of its proper divisors (25296178).

33728228 is a wasteful number, since it uses less digits than its factorization.

33728228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432061 (or 8432059 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 33728228 is about 5807.6008816033. The cubic root of 33728228 is about 323.0956976647.

The spelling of 33728228 in words is "thirty-three million, seven hundred twenty-eight thousand, two hundred twenty-eight".