33728222 has 8 divisors (see below), whose sum is σ = 55191672. Its totient is φ = 15331000.

The previous prime is 33728213. The next prime is 33728231. The reversal of 33728222 is 22282733.

It is an interprime number because it is at equal distance from previous prime (33728213) and next prime (33728231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33728222² = 2275185918562568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766529 + ... + 766572.

It is an arithmetic number, because the mean of its divisors is an integer number (6898959).

Almost surely, 2^33728222 is an apocalyptic number.

33728222 is a deficient number, since it is larger than the sum of its proper divisors (21463450).

33728222 is a wasteful number, since it uses less digits than its factorization.

33728222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533114.

The product of its digits is 8064, while the sum is 29.

The square root of 33728222 is about 5807.6003650389. The cubic root of 33728222 is about 323.0956785059.

The spelling of 33728222 in words is "thirty-three million, seven hundred twenty-eight thousand, two hundred twenty-two".